//m.getgobooth.com/ 必威体育下载 daily 15 2024-10-08 13:42:50 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-10-08 13:42:50 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1781 Author(s): RUAN HANG-YU <br/><p>Starting from two-line soliton solution of an integrable (2+1)-dimensional system in bilinear form,one can find a dromion solution that is localized in all directions for a suitable potential.The in-teraction between two dromions is studied in detail through the method of figure analysis for (2+1)-dimensional NLBQ equation and KP equation.Except for a phase shift,there are no changes on the shape and velocity of the dromions after interactions for these models.The interactions of dromions for these models are not only elastic (there is no exchange of energy)but also irrotational (there is no exchange of angular momentum).</p> <br/>Acta Physica Sinica. 1999 48(10): 1781-1792. Published 1999-05-05 Author(s): RUAN HANG-YU <br/><p>Starting from two-line soliton solution of an integrable (2+1)-dimensional system in bilinear form,one can find a dromion solution that is localized in all directions for a suitable potential.The in-teraction between two dromions is studied in detail through the method of figure analysis for (2+1)-dimensional NLBQ equation and KP equation.Except for a phase shift,there are no changes on the shape and velocity of the dromions after interactions for these models.The interactions of dromions for these models are not only elastic (there is no exchange of energy)but also irrotational (there is no exchange of angular momentum).</p> <br/>Acta Physica Sinica. 1999 48(10): 1781-1792. Published 1999-05-05 THE STUDY OF MULTI-DROMION STRUCTURES AND INTERACTIONS OF (2+1)-DIMENSIONAL NLBQ EQUATION AND KP EQUATION RUAN HANG-YU 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1781-1792. article doi:10.7498/aps.48.1781 10.7498/aps.48.1781 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1781 1781-1792 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1793 Author(s): LIU WEN-BIAO, LI XIANG <br/><p>A falling-in physical particle in metric and electromagnetic tensor field of Schwarzschild and Kerr-Newman black hole is studied.It is concluded that the physical particle will not make the outer horizon smaller.This is coincident with the area theorem.It is well known that δA≥0 andδκ≤0 are the necessary condition for changing from nonextremal to extremal Kerr-Newman black hole.We demonstrate that the surface gravity (temperature) of a Kerr-Newman black hole cannot be reduced to zero in a finite sequence of physical interactions.This is coincident with the third law of black hole thermodynamics.We also consider the trend of area change in the evolution of near-extremal black hole.The effect of negative heat capacity and the entropy renormalization are discussed.</p> <br/>Acta Physica Sinica. 1999 48(10): 1793-1799. Published 1999-05-05 Author(s): LIU WEN-BIAO, LI XIANG <br/><p>A falling-in physical particle in metric and electromagnetic tensor field of Schwarzschild and Kerr-Newman black hole is studied.It is concluded that the physical particle will not make the outer horizon smaller.This is coincident with the area theorem.It is well known that δA≥0 andδκ≤0 are the necessary condition for changing from nonextremal to extremal Kerr-Newman black hole.We demonstrate that the surface gravity (temperature) of a Kerr-Newman black hole cannot be reduced to zero in a finite sequence of physical interactions.This is coincident with the third law of black hole thermodynamics.We also consider the trend of area change in the evolution of near-extremal black hole.The effect of negative heat capacity and the entropy renormalization are discussed.</p> <br/>Acta Physica Sinica. 1999 48(10): 1793-1799. Published 1999-05-05 FROM SCHWARZSCHILD BLACK HOLE TO KERR-NEWMAN BLACK HOLE LIU WEN-BIAO, LI XIANG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1793-1799. article doi:10.7498/aps.48.1793 10.7498/aps.48.1793 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1793 1793-1799 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1800 Author(s): LIU MU-REN, CHEN RUO-HANG, LI HUA-BING, KONG LING-JIANG <br/><p>A lattice Boltzmann method for two-dimensional convection-diffusion equation is presented in the paper.The tunable parameters in Chapman-Enskog expansion of the local-equilibrium distribution function are determined in the form of convective coefficient and diffusive coefficient.Some discussion on the method is made.</p> <br/>Acta Physica Sinica. 1999 48(10): 1800-1803. Published 1999-05-05 Author(s): LIU MU-REN, CHEN RUO-HANG, LI HUA-BING, KONG LING-JIANG <br/><p>A lattice Boltzmann method for two-dimensional convection-diffusion equation is presented in the paper.The tunable parameters in Chapman-Enskog expansion of the local-equilibrium distribution function are determined in the form of convective coefficient and diffusive coefficient.Some discussion on the method is made.</p> <br/>Acta Physica Sinica. 1999 48(10): 1800-1803. Published 1999-05-05 A LATTICE BOLTZMANN METHOD FOR TWO-DIMENSIONAL CONVECTION-DIFFUSION EQUATION LIU MU-REN, CHEN RUO-HANG, LI HUA-BING, KONG LING-JIANG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1800-1803. article doi:10.7498/aps.48.1800 10.7498/aps.48.1800 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1800 1800-1803 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1804 Author(s): ZHOU PING <br/><p>A new method of controlling unstable fixed points in discrete nonlinear systems is suggested in this paper.The method of choosing combination coefficients and feedback coefficients is give.This method is applied to Logistic map and analogous Henon map.Good results have been obtained.</p> <br/>Acta Physica Sinica. 1999 48(10): 1804-1809. Published 1999-05-05 Author(s): ZHOU PING <br/><p>A new method of controlling unstable fixed points in discrete nonlinear systems is suggested in this paper.The method of choosing combination coefficients and feedback coefficients is give.This method is applied to Logistic map and analogous Henon map.Good results have been obtained.</p> <br/>Acta Physica Sinica. 1999 48(10): 1804-1809. Published 1999-05-05 CONTROL OF UNSTABLE FIXED POINTS IN DISCRETE NONLINEAR SYSTEMS ZHOU PING 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1804-1809. article doi:10.7498/aps.48.1804 10.7498/aps.48.1804 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1804 1804-1809 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1810 Author(s): HUANG XIAN-GAO, XU JIAN-XUE, HE DAI-HAI, XIA JUN-LI, LV ZE-JUN <br/><p>We apply the wavelet multiscaling decomposition algorithm,which has been developed for noise reduction,to the extraction of periodic signal,noise and other chaotic signal from chaotic back-ground.This algorithm utilizes the characteristic that wavelet transform has an outstanding local fea-ture in time-frequency domains and it is a linear transform.Therefore it can distinguishes signals with different scales.In contrast to the previous methods our method uses the feature of signal scales and dose not demand restrictive assumptions that we must know the mathematical model of the chaotic background and that the amplitude of signal is smaller than that of the chaotic background.The re-sults of computer simulation are given for extracting the sine signal,white noises (distributed uni-formly or in Gaussion shape) and Chua's chaotic signal from Lorenz chaotic back ground.</p> <br/>Acta Physica Sinica. 1999 48(10): 1810-1817. Published 1999-05-05 Author(s): HUANG XIAN-GAO, XU JIAN-XUE, HE DAI-HAI, XIA JUN-LI, LV ZE-JUN <br/><p>We apply the wavelet multiscaling decomposition algorithm,which has been developed for noise reduction,to the extraction of periodic signal,noise and other chaotic signal from chaotic back-ground.This algorithm utilizes the characteristic that wavelet transform has an outstanding local fea-ture in time-frequency domains and it is a linear transform.Therefore it can distinguishes signals with different scales.In contrast to the previous methods our method uses the feature of signal scales and dose not demand restrictive assumptions that we must know the mathematical model of the chaotic background and that the amplitude of signal is smaller than that of the chaotic background.The re-sults of computer simulation are given for extracting the sine signal,white noises (distributed uni-formly or in Gaussion shape) and Chua's chaotic signal from Lorenz chaotic back ground.</p> <br/>Acta Physica Sinica. 1999 48(10): 1810-1817. Published 1999-05-05 REDUCTION OF NOISE IN CHAOTIC SYSTEMS BY WAVELET MULTISCALING DECOMPOSITION ALGORITHM HUANG XIAN-GAO, XU JIAN-XUE, HE DAI-HAI, XIA JUN-LI, LV ZE-JUN 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1810-1817. article doi:10.7498/aps.48.1810 10.7498/aps.48.1810 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1810 1810-1817 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1818 Author(s): CHAI LU, XING QI-RONG, ZHANG WEI-LI, WANG QING-YUE <br/><p>Chaotic behaviors in a self-mode-locked Ti:sapphier ring laser are reported.The Regular,peri-od-doubling,quasi-periodic and chaotic behaviors are observed under some control conditions.The ex-perimental observations are in agreement with the theoretical predictions by V.L.Kalashnikov et al.</p> <br/>Acta Physica Sinica. 1999 48(10): 1818-1822. Published 1999-05-05 Author(s): CHAI LU, XING QI-RONG, ZHANG WEI-LI, WANG QING-YUE <br/><p>Chaotic behaviors in a self-mode-locked Ti:sapphier ring laser are reported.The Regular,peri-od-doubling,quasi-periodic and chaotic behaviors are observed under some control conditions.The ex-perimental observations are in agreement with the theoretical predictions by V.L.Kalashnikov et al.</p> <br/>Acta Physica Sinica. 1999 48(10): 1818-1822. Published 1999-05-05 CHAOTIC BEHAVIORS IN A SELF-MODE-LOCKED TI：SAPPHIRE RING LASER CHAI LU, XING QI-RONG, ZHANG WEI-LI, WANG QING-YUE 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1818-1822. article doi:10.7498/aps.48.1818 10.7498/aps.48.1818 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1818 1818-1822 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1823 Author(s): CAO ZHI-JUE, GUO YU <br/><p>Using the criterion of the free energy,we prove that the mechanical equilibrium condition for liquid droups on the condenser surface depends on the angle of contact (α).For α＞90°the chemical potential of liquid drops on the condenser surface is less than that of spherical drops with the same curvature.And the critical radius of the former is also less than that of the latter if they are at the same saturation level.For this reason the heat-transfer capability of liquid drops condensed on the walls of a vessel is stronger than that of the condensed liquid film.The suitable value is determined for the angle of contact.</p> <br/>Acta Physica Sinica. 1999 48(10): 1823-1830. Published 1999-05-05 Author(s): CAO ZHI-JUE, GUO YU <br/><p>Using the criterion of the free energy,we prove that the mechanical equilibrium condition for liquid droups on the condenser surface depends on the angle of contact (α).For α＞90°the chemical potential of liquid drops on the condenser surface is less than that of spherical drops with the same curvature.And the critical radius of the former is also less than that of the latter if they are at the same saturation level.For this reason the heat-transfer capability of liquid drops condensed on the walls of a vessel is stronger than that of the condensed liquid film.The suitable value is determined for the angle of contact.</p> <br/>Acta Physica Sinica. 1999 48(10): 1823-1830. Published 1999-05-05 THEMODYNAMIC MECHANISM FOR THE CONDENSATION OF LIQUID DROPS ON THE CONDENSER SURFACE CAO ZHI-JUE, GUO YU 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1823-1830. article doi:10.7498/aps.48.1823 10.7498/aps.48.1823 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1823 1823-1830 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1831 Author(s): XIANG JI-YING, WU ZHEN, ZENG SHAO-QUN, LUO QING-MING, ZHANG PING, HUANG DE-XIU <br/><p>With the consideratioin of both defocused and abaxial cases,the analytical expressions for the 3D transfer function of optical low coherence tomography are derived in this paper.The theoretical stud-ies are concerned with the resolution-related factors,which furnish evidences for the designation and optimization of the systems.According to our study,the axis resolution would increase linearly with the spectral bandwidth,while the signal level would decrease linearly.In the case of defocused scan-ning,although longer focus length and narrower beam aperture could result in an absolute decrement of the resolution,they give an even better defocused imaging property in the whole scanning region.The detected waveform and the actual image of the optical coherence tomography are also given.</p> <br/>Acta Physica Sinica. 1999 48(10): 1831-1838. Published 1999-05-05 Author(s): XIANG JI-YING, WU ZHEN, ZENG SHAO-QUN, LUO QING-MING, ZHANG PING, HUANG DE-XIU <br/><p>With the consideratioin of both defocused and abaxial cases,the analytical expressions for the 3D transfer function of optical low coherence tomography are derived in this paper.The theoretical stud-ies are concerned with the resolution-related factors,which furnish evidences for the designation and optimization of the systems.According to our study,the axis resolution would increase linearly with the spectral bandwidth,while the signal level would decrease linearly.In the case of defocused scan-ning,although longer focus length and narrower beam aperture could result in an absolute decrement of the resolution,they give an even better defocused imaging property in the whole scanning region.The detected waveform and the actual image of the optical coherence tomography are also given.</p> <br/>Acta Physica Sinica. 1999 48(10): 1831-1838. Published 1999-05-05 ANALYSIS OF 3D TRANSFER FUNCTIONS OF OPTICAL COHERENCE TOMOGRAPHY XIANG JI-YING, WU ZHEN, ZENG SHAO-QUN, LUO QING-MING, ZHANG PING, HUANG DE-XIU 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1831-1838. article doi:10.7498/aps.48.1831 10.7498/aps.48.1831 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1831 1831-1838 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1839 Author(s): MA YU-GANG <br/><p>The emission of light particles (LP),charged particles (CP),intermediate mass fragments (IMF) and the largest fragment(MAX) for 129Xe is investigated in the frame of lattice gas model.Definite turning points for the slopes of average multiplicity of LP,CP and IMF,mean mass of the largest fragment(Amax)and mean excitation energy per nucleon(E*/A)of the dissociation source against temperature are shown at 5—5.5MeV,where the largest variances of the distributions of LP,CP,IMF,MAX and E*/A are observed also.Furthermore,the slopes of these variances with temperature show discontinuities at the same temperature.All these features indicate that the largest critical fluctuation is simultaneously accompanied by the critical phenomenon and phase transition at the turning temperature in the lattice gas model.</p> <br/>Acta Physica Sinica. 1999 48(10): 1839-1844. Published 1999-05-05 Author(s): MA YU-GANG <br/><p>The emission of light particles (LP),charged particles (CP),intermediate mass fragments (IMF) and the largest fragment(MAX) for 129Xe is investigated in the frame of lattice gas model.Definite turning points for the slopes of average multiplicity of LP,CP and IMF,mean mass of the largest fragment(Amax)and mean excitation energy per nucleon(E*/A)of the dissociation source against temperature are shown at 5—5.5MeV,where the largest variances of the distributions of LP,CP,IMF,MAX and E*/A are observed also.Furthermore,the slopes of these variances with temperature show discontinuities at the same temperature.All these features indicate that the largest critical fluctuation is simultaneously accompanied by the critical phenomenon and phase transition at the turning temperature in the lattice gas model.</p> <br/>Acta Physica Sinica. 1999 48(10): 1839-1844. Published 1999-05-05 PARTICLE EMISSION AND CRITICAL FLUCTUATION IN NUCLEAR DISASSEMBLY MA YU-GANG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1839-1844. article doi:10.7498/aps.48.1839 10.7498/aps.48.1839 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1839 1839-1844 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1845 Author(s): LUO MING, BI ZHI-YI, CHEN YANG-QIN, MA LONG-SHENG <br/><p>Modulation Transfer Spectroscopy (MTS) has been proved to be a very effective method in laser stabilization.The asymmetric sidebands shift the line center of the MTS spectrum,and then re-duce the long term stability and reproducity of laser frequency.In this paper the formula for the line shape of MTS is derived based on the density matrix equations.The formula is applied for the calcu-lation of either the symmetric or asymmetric sidebands.Using this formula,The frequency shift due to the asymmetricity of the sidebands i s estimated.</p> <br/>Acta Physica Sinica. 1999 48(10): 1845-1851. Published 1999-05-05 Author(s): LUO MING, BI ZHI-YI, CHEN YANG-QIN, MA LONG-SHENG <br/><p>Modulation Transfer Spectroscopy (MTS) has been proved to be a very effective method in laser stabilization.The asymmetric sidebands shift the line center of the MTS spectrum,and then re-duce the long term stability and reproducity of laser frequency.In this paper the formula for the line shape of MTS is derived based on the density matrix equations.The formula is applied for the calcu-lation of either the symmetric or asymmetric sidebands.Using this formula,The frequency shift due to the asymmetricity of the sidebands i s estimated.</p> <br/>Acta Physica Sinica. 1999 48(10): 1845-1851. Published 1999-05-05 LINE-CENTER SHIFT OF MODULATION TRANSFER SPECTROSCOPY DUE TO THE ASYMMETRICITY OF SIDEBANDS LUO MING, BI ZHI-YI, CHEN YANG-QIN, MA LONG-SHENG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1845-1851. article doi:10.7498/aps.48.1845 10.7498/aps.48.1845 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1845 1845-1851 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1852 Author(s): YANG CHUAN-LU, ZHU ZHENG-HE <br/><p>The pressure-broadened cross section (kinetic energy of the collision range:30 cm-1—1000cm-1) and the avarage relaxation cross section (temperature of the interaction system:125K,175K,300K) for pure rotational dipole transition of HCl in Ar are calculated,by employing infinite or-der sudden approximation (IOSA) and Ar-HCl H6(2) analyti potential energy surface of Hutson.Comparing the IOSA results with Close-Coupling results and experiments,we find that IOSA can give satisfactory results for j=0←j=1 transition line of the molecules which have large rotational constant.Unfortunately,modfication must be performed for using IOSA in the exitation of transition lines.</p> <br/>Acta Physica Sinica. 1999 48(10): 1852-1857. Published 1999-05-05 Author(s): YANG CHUAN-LU, ZHU ZHENG-HE <br/><p>The pressure-broadened cross section (kinetic energy of the collision range:30 cm-1—1000cm-1) and the avarage relaxation cross section (temperature of the interaction system:125K,175K,300K) for pure rotational dipole transition of HCl in Ar are calculated,by employing infinite or-der sudden approximation (IOSA) and Ar-HCl H6(2) analyti potential energy surface of Hutson.Comparing the IOSA results with Close-Coupling results and experiments,we find that IOSA can give satisfactory results for j=0←j=1 transition line of the molecules which have large rotational constant.Unfortunately,modfication must be performed for using IOSA in the exitation of transition lines.</p> <br/>Acta Physica Sinica. 1999 48(10): 1852-1857. Published 1999-05-05 THEORETICAL CALCULATION OF PRESSURE-BROADENED CROSS SECTION FOR PURE ROTATIONAL DIPOLE TRANSITION OF Hel IN Ar YANG CHUAN-LU, ZHU ZHENG-HE 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1852-1857. article doi:10.7498/aps.48.1852 10.7498/aps.48.1852 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1852 1852-1857 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1858 Author(s): TENG ZHOU-XUAN, CHEN CHONG-YANG, WANG YAN-SEN, XU XUE-JI, SUN YONG-SHENG <br/><p>A distorted -wave Born exchange (DWBE) approximation is used to calculate the resonance-ex-citation double autoionization (REDA) for the Li Isoelectronic sequence.Comparison shows good a-greement between the present calculation and experimental data and other theoretical results.In this paper,our research is focused on the effect of the configuration-mixing and radiation channel on the REDA,and the REDA contribution to the ionization process.Also their variation with ion charge Z is given.</p> <br/>Acta Physica Sinica. 1999 48(10): 1858-1863. Published 1999-05-05 Author(s): TENG ZHOU-XUAN, CHEN CHONG-YANG, WANG YAN-SEN, XU XUE-JI, SUN YONG-SHENG <br/><p>A distorted -wave Born exchange (DWBE) approximation is used to calculate the resonance-ex-citation double autoionization (REDA) for the Li Isoelectronic sequence.Comparison shows good a-greement between the present calculation and experimental data and other theoretical results.In this paper,our research is focused on the effect of the configuration-mixing and radiation channel on the REDA,and the REDA contribution to the ionization process.Also their variation with ion charge Z is given.</p> <br/>Acta Physica Sinica. 1999 48(10): 1858-1863. Published 1999-05-05 DISTORTED-WAVE CALCULATIONS OF THE RESONANCE EXCITATION DOUBLE AUTOIONIZATION CROSS SECTIONS FOR THE Li ISOELECTRONIC SEQUENCE TENG ZHOU-XUAN, CHEN CHONG-YANG, WANG YAN-SEN, XU XUE-JI, SUN YONG-SHENG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1858-1863. article doi:10.7498/aps.48.1858 10.7498/aps.48.1858 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1858 1858-1863 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1864 Author(s): XIONG JIN, HU XIANG-MING, PENG JIN-SHENG <br/><p>In this paper the laser linewidth without rotating wave approximation is studied by keeping the ratio of the atomic natural decay rate to the radiation frequency to two orders.It is shown that while the linewidth is confined to the Schawlow-Townes formula,the non-rotating wave terms would cause the linewidth to increase since the non-rotating wave terms decrease the average photon number.The degree of increasing in linewidth depends not only on the square of the ratio of the atomic natural de-cay rate to radiation frequency,but also on the average photon number in rotating wave approxima-tion.The influence of the non-rotating wave terms on the laser linewidth is much larger than on the photon number fluctuations.</p> <br/>Acta Physica Sinica. 1999 48(10): 1864-1868. Published 1999-05-05 Author(s): XIONG JIN, HU XIANG-MING, PENG JIN-SHENG <br/><p>In this paper the laser linewidth without rotating wave approximation is studied by keeping the ratio of the atomic natural decay rate to the radiation frequency to two orders.It is shown that while the linewidth is confined to the Schawlow-Townes formula,the non-rotating wave terms would cause the linewidth to increase since the non-rotating wave terms decrease the average photon number.The degree of increasing in linewidth depends not only on the square of the ratio of the atomic natural de-cay rate to radiation frequency,but also on the average photon number in rotating wave approxima-tion.The influence of the non-rotating wave terms on the laser linewidth is much larger than on the photon number fluctuations.</p> <br/>Acta Physica Sinica. 1999 48(10): 1864-1868. Published 1999-05-05 LASER LINEWIDTH WITHOUT ROTATING WAVE APPROXIMATION XIONG JIN, HU XIANG-MING, PENG JIN-SHENG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1864-1868. article doi:10.7498/aps.48.1864 10.7498/aps.48.1864 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1864 1864-1868 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1869 Author(s): ZHANG BIN, MA HONG, LV BAI-DA <br/><p>Based on the second moments method and orthogonal basis mode expansion,analytical expre-sions for the M2-factor and mode coherence coefficients of sinh-Gaussian beams have been derived,thus the coherent-mode decompositions of sinh-Gaussian beams have been made.A simple method has also been proposed to produce sinh-Gaussian beams in the laboratory.</p> <br/>Acta Physica Sinica. 1999 48(10): 1869-1874. Published 1999-05-05 Author(s): ZHANG BIN, MA HONG, LV BAI-DA <br/><p>Based on the second moments method and orthogonal basis mode expansion,analytical expre-sions for the M2-factor and mode coherence coefficients of sinh-Gaussian beams have been derived,thus the coherent-mode decompositions of sinh-Gaussian beams have been made.A simple method has also been proposed to produce sinh-Gaussian beams in the laboratory.</p> <br/>Acta Physica Sinica. 1999 48(10): 1869-1874. Published 1999-05-05 M2-FACTOR AND COHERENT-MODE DECOMPOSITION OF SINH-GAUSSIAN BEAMS ZHANG BIN, MA HONG, LV BAI-DA 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1869-1874. article doi:10.7498/aps.48.1869 10.7498/aps.48.1869 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1869 1869-1874 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1875 Author(s): JIAO WEN-TAO, XIN JIANGUO <br/><p>In this paper,we have studied experimentally the properties of the mode structure and modes evolution of a slab waveguide CO2 laser with a far field intensity distribution of a single spatially sup-pressed peak. It has been found that the laser mode is a new single mode of a slab waveguide CO2 laser,which has a different mode structure from the known mode of slab waveguide gas laser.</p> <br/>Acta Physica Sinica. 1999 48(10): 1875-1883. Published 1999-05-05 Author(s): JIAO WEN-TAO, XIN JIANGUO <br/><p>In this paper,we have studied experimentally the properties of the mode structure and modes evolution of a slab waveguide CO2 laser with a far field intensity distribution of a single spatially sup-pressed peak. It has been found that the laser mode is a new single mode of a slab waveguide CO2 laser,which has a different mode structure from the known mode of slab waveguide gas laser.</p> <br/>Acta Physica Sinica. 1999 48(10): 1875-1883. Published 1999-05-05 EXPERIMENTAL STUDY ON A RF-EXCTTED SLAB WAVEGUIDE CO2 LASER WITH THE FAR FIELD INTENSITY DISTRIBUTION OF A SINGLE SUPPRESSED PEAK JIAO WEN-TAO, XIN JIANGUO 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1875-1883. article doi:10.7498/aps.48.1875 10.7498/aps.48.1875 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1875 1875-1883 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1884 Author(s): JIANG YAN, CUI YI-PING, PANG SHU-MING <br/><p>A kind of tunable frequency-selective converter based on nondegenerate four-wave mixing (ND-FWM) in semiconductor laser amplifier (SLA) is proposed in this paper.The coupling model of the frequency-selective converter in SLA is established first,and then the converting mechanism and characteristics are analyzed.The influences of its property parameters on the output efficiency,and the frequency shift are primarily discussed.And the property of the output noise of the frequency-se-lective converter has been studied as well.The superior performance of the converter,such as short response time,high conversion efficiency,and large conversion range,makes it favorable for use in DWDM networks where high speed and tunableness are required.</p> <br/>Acta Physica Sinica. 1999 48(10): 1884-1890. Published 1999-05-05 Author(s): JIANG YAN, CUI YI-PING, PANG SHU-MING <br/><p>A kind of tunable frequency-selective converter based on nondegenerate four-wave mixing (ND-FWM) in semiconductor laser amplifier (SLA) is proposed in this paper.The coupling model of the frequency-selective converter in SLA is established first,and then the converting mechanism and characteristics are analyzed.The influences of its property parameters on the output efficiency,and the frequency shift are primarily discussed.And the property of the output noise of the frequency-se-lective converter has been studied as well.The superior performance of the converter,such as short response time,high conversion efficiency,and large conversion range,makes it favorable for use in DWDM networks where high speed and tunableness are required.</p> <br/>Acta Physica Sinica. 1999 48(10): 1884-1890. Published 1999-05-05 TUNABLE FREQUENCY-SELECTIVE CONVERTER FOR HIGH-SPEED DWDM SYSTEMS JIANG YAN, CUI YI-PING, PANG SHU-MING 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1884-1890. article doi:10.7498/aps.48.1884 10.7498/aps.48.1884 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1884 1884-1890 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1891 Author(s): XIAO JUN, LV BAI-DA, ZHANG BIN <br/><p>Based on the diffraction integral theory,the near far-field characteristics of a laser-beamtrans-formed random phase plate have been studied theoretically and numerically ain a rather general case.The spot smoothing,profile controlling and speckle inhibiting by introducing the random phase plate have been analyzed in detail.Some new results obtained here are useful for practical applications of the random phase plate.</p> <br/>Acta Physica Sinica. 1999 48(10): 1891-1897. Published 1999-05-05 Author(s): XIAO JUN, LV BAI-DA, ZHANG BIN <br/><p>Based on the diffraction integral theory,the near far-field characteristics of a laser-beamtrans-formed random phase plate have been studied theoretically and numerically ain a rather general case.The spot smoothing,profile controlling and speckle inhibiting by introducing the random phase plate have been analyzed in detail.Some new results obtained here are useful for practical applications of the random phase plate.</p> <br/>Acta Physica Sinica. 1999 48(10): 1891-1897. Published 1999-05-05 TRANSFORMATION CHARACTERISTICS OF LASER BEAM THROUGH A RANDOM PHASE PLATE XIAO JUN, LV BAI-DA, ZHANG BIN 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1891-1897. article doi:10.7498/aps.48.1891 10.7498/aps.48.1891 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1891 1891-1897 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1898 Author(s): LIN ZI-YANG, XIANG YING, ZHANG JIE-LI, MA SHI-YONG, XU ZE-DA <br/><p>In this paper,numerical calculations of magnetically induced twist effeet in planar nematic liquid crystal are presented.The transmission of polarized light passing through magnetically induced twist distribution in planar nematic liquid crystal is calculated with “4*4”matrix algorithm.On the ex-perimental side,the optical phase retardation method is used to detect the magnetically induced twist effect in planar nematic liquid crystal 5CB(4′-n-penty1-4-cyanobiphenyl) at 27℃.Theoretical cal-culation and experimental results illustrate that polarized light can be used to study the twist effect in thin sample of planar nematic liquid crystal.</p> <br/>Acta Physica Sinica. 1999 48(10): 1898-1903. Published 1999-05-05 Author(s): LIN ZI-YANG, XIANG YING, ZHANG JIE-LI, MA SHI-YONG, XU ZE-DA <br/><p>In this paper,numerical calculations of magnetically induced twist effeet in planar nematic liquid crystal are presented.The transmission of polarized light passing through magnetically induced twist distribution in planar nematic liquid crystal is calculated with “4*4”matrix algorithm.On the ex-perimental side,the optical phase retardation method is used to detect the magnetically induced twist effect in planar nematic liquid crystal 5CB(4′-n-penty1-4-cyanobiphenyl) at 27℃.Theoretical cal-culation and experimental results illustrate that polarized light can be used to study the twist effect in thin sample of planar nematic liquid crystal.</p> <br/>Acta Physica Sinica. 1999 48(10): 1898-1903. Published 1999-05-05 STUDY OF MAGNETICALLY INDUCED TWIST EFFECT IN PLANAR NEMATIC LIQUID CRYSTAL BY PHASE RETARDATION METHOD LIN ZI-YANG, XIANG YING, ZHANG JIE-LI, MA SHI-YONG, XU ZE-DA 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1898-1903. article doi:10.7498/aps.48.1898 10.7498/aps.48.1898 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1898 1898-1903 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1904 Author(s): HUANG DAN-YUN, CHE JING-GUANG, ZHANG KAI-MING <br/><p>Using first principles total energy calculations,the surface energies of Mo and W before and af-ter adsorbing Rh thin films in [111] and [110] orientations are calculated.The calculation results indicate that clean (111) surfaces of both Mo and W cannot transform to {110} facets,in agreement with experimental observations.When the coverage of Rh arrives at one physical monolayer,Rh/Mo(111) still cannot facet to {110},while under a favorable energy condition for the transforma-tion,Rh/W(111) may facet to {110}.</p> <br/>Acta Physica Sinica. 1999 48(10): 1904-1910. Published 1999-05-05 Author(s): HUANG DAN-YUN, CHE JING-GUANG, ZHANG KAI-MING <br/><p>Using first principles total energy calculations,the surface energies of Mo and W before and af-ter adsorbing Rh thin films in [111] and [110] orientations are calculated.The calculation results indicate that clean (111) surfaces of both Mo and W cannot transform to {110} facets,in agreement with experimental observations.When the coverage of Rh arrives at one physical monolayer,Rh/Mo(111) still cannot facet to {110},while under a favorable energy condition for the transforma-tion,Rh/W(111) may facet to {110}.</p> <br/>Acta Physica Sinica. 1999 48(10): 1904-1910. Published 1999-05-05 POSSIBILITY OF FACETING TRANSFORMATION OF Mo AND W FROM (111) TO {110} INDUCED BY ULTRATHIN FILM Rh HUANG DAN-YUN, CHE JING-GUANG, ZHANG KAI-MING 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1904-1910. article doi:10.7498/aps.48.1904 10.7498/aps.48.1904 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1904 1904-1910 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1911 Author(s): WANG XIAO-PING, ZHOU XIANG, HE JUN, LIAO LIANG-SHENG, WU ZI-QIN <br/><p>The multifractal approach was used to describe the failure process of organic thin film electrolu-minescence observed with fluomicroscope dynamically.It was found that the failure of the electrolu-minescence resulted from the bubbles generated at the interface between the organic layper and the metal electrode.The bubbles became more and more numerous during the device working.Multifrac-tal spectra showed that the longer the working time or the higher the loaded voltage of the device,the narrower the spectrum.This result was in good agreement with the experimental observation.</p> <br/>Acta Physica Sinica. 1999 48(10): 1911-1916. Published 1999-05-05 Author(s): WANG XIAO-PING, ZHOU XIANG, HE JUN, LIAO LIANG-SHENG, WU ZI-QIN <br/><p>The multifractal approach was used to describe the failure process of organic thin film electrolu-minescence observed with fluomicroscope dynamically.It was found that the failure of the electrolu-minescence resulted from the bubbles generated at the interface between the organic layper and the metal electrode.The bubbles became more and more numerous during the device working.Multifrac-tal spectra showed that the longer the working time or the higher the loaded voltage of the device,the narrower the spectrum.This result was in good agreement with the experimental observation.</p> <br/>Acta Physica Sinica. 1999 48(10): 1911-1916. Published 1999-05-05 MULTIFRACTAL OF THE FAILURE PEROCESS OF ELECTROLUMINSCENCE OF ORGANIC THIN FILM WANG XIAO-PING, ZHOU XIANG, HE JUN, LIAO LIANG-SHENG, WU ZI-QIN 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1911-1916. article doi:10.7498/aps.48.1911 10.7498/aps.48.1911 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1911 1911-1916 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1917 Author(s): LIAN GUI-JUN, LI MEI-YA, KANG JIN-FENG, GUO JIAN-DONG, SUN YUN-FENG, XIONG GUANG-CHENG <br/><p>Based on the ahievement of epitaxial growth in several Perovskite oxide films,we discuss the importance of substrate temperature (Ts) and substrate material in the epitaxial growth of per-ovskite oxide thin films.Influences of Ts on growth orientation and epitaxial threshold temperature were observed.The results indicate that during the growth of the oxide films the phase formation and growth dynamics should be taken into considera tion.The threshold temperature for epitaxial growth depends on the substrate materials.This demonstrates the influence of substrate material on the initial nucleation and epitaxial growth.</p> <br/>Acta Physica Sinica. 1999 48(10): 1917-1922. Published 1999-05-05 Author(s): LIAN GUI-JUN, LI MEI-YA, KANG JIN-FENG, GUO JIAN-DONG, SUN YUN-FENG, XIONG GUANG-CHENG <br/><p>Based on the ahievement of epitaxial growth in several Perovskite oxide films,we discuss the importance of substrate temperature (Ts) and substrate material in the epitaxial growth of per-ovskite oxide thin films.Influences of Ts on growth orientation and epitaxial threshold temperature were observed.The results indicate that during the growth of the oxide films the phase formation and growth dynamics should be taken into considera tion.The threshold temperature for epitaxial growth depends on the substrate materials.This demonstrates the influence of substrate material on the initial nucleation and epitaxial growth.</p> <br/>Acta Physica Sinica. 1999 48(10): 1917-1922. Published 1999-05-05 EPITAXIAL GROWTH OF PEROVSKITE OXIDE THIN FILMS LIAN GUI-JUN, LI MEI-YA, KANG JIN-FENG, GUO JIAN-DONG, SUN YUN-FENG, XIONG GUANG-CHENG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1917-1922. article doi:10.7498/aps.48.1917 10.7498/aps.48.1917 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1917 1917-1922 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1923 Author(s): YE XIAO-LING, YANG XIAO-YU, SHI CHAO-SHU, GUO CHANG-XIN <br/><p>The electronic structure in UV-VUV region of PbWO4 crystaly is studied in a molecular-cluster model within the framework of the fully relativistic self-consistent Dirac-Slater theory,using a nu-merical discrete variational (DV-Xα) method.From the calculation,the fundamental gap is found to be around 4.4eV,the top of valence band is formed almost purely by O 2p and has certain Pb 6s component in the band,W 5d is at the bottom of the conduction band,Pb 6s narrow band is just be-low the valence band.These results are in reasonable agreement with experimental data measured in the fundamental absorption region using VUV synchrotron radiation.</p> <br/>Acta Physica Sinica. 1999 48(10): 1923-1929. Published 1999-05-05 Author(s): YE XIAO-LING, YANG XIAO-YU, SHI CHAO-SHU, GUO CHANG-XIN <br/><p>The electronic structure in UV-VUV region of PbWO4 crystaly is studied in a molecular-cluster model within the framework of the fully relativistic self-consistent Dirac-Slater theory,using a nu-merical discrete variational (DV-Xα) method.From the calculation,the fundamental gap is found to be around 4.4eV,the top of valence band is formed almost purely by O 2p and has certain Pb 6s component in the band,W 5d is at the bottom of the conduction band,Pb 6s narrow band is just be-low the valence band.These results are in reasonable agreement with experimental data measured in the fundamental absorption region using VUV synchrotron radiation.</p> <br/>Acta Physica Sinica. 1999 48(10): 1923-1929. Published 1999-05-05 THEORETIC CALCULATION ON THE ELECTRONIC STRUCTURE OF PbWO4 CRYSTALS YE XIAO-LING, YANG XIAO-YU, SHI CHAO-SHU, GUO CHANG-XIN 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1923-1929. article doi:10.7498/aps.48.1923 10.7498/aps.48.1923 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1923 1923-1929 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1930 Author(s): XU JING, LI JIE <br/><p>The variation of interchain potential in poly (vinylidene fluoride) polymer during chain rotation was calculated.In the case that center chain rotates while all other chains keep static as discussed by “six-site-potential” theory,the potential curves show four high potential barriers owing to the steric effect of fluorine atom from adjacent molecule,which is in contrast to the six-fold sysmmetry pre-dicted by the “six-site-potential” model.It was found that if all chains rotate synchronically, the barrier height will reduce dramatically.The result also indicates that the polarization reversal is ac-complished with the change of lattice constant.The finally obtained barrier height is about 7.5kJ/mol.In comparison with the thermal energy of chain rotation at room temperature (about2.5kJ/mol),the potential well is too shallow to form stable spontaneous polarization.It was specu-lated therefore,the formation of spontaneous polarization in these materials should include some ex-ternal factors.</p> <br/>Acta Physica Sinica. 1999 48(10): 1930-1937. Published 1999-05-05 Author(s): XU JING, LI JIE <br/><p>The variation of interchain potential in poly (vinylidene fluoride) polymer during chain rotation was calculated.In the case that center chain rotates while all other chains keep static as discussed by “six-site-potential” theory,the potential curves show four high potential barriers owing to the steric effect of fluorine atom from adjacent molecule,which is in contrast to the six-fold sysmmetry pre-dicted by the “six-site-potential” model.It was found that if all chains rotate synchronically, the barrier height will reduce dramatically.The result also indicates that the polarization reversal is ac-complished with the change of lattice constant.The finally obtained barrier height is about 7.5kJ/mol.In comparison with the thermal energy of chain rotation at room temperature (about2.5kJ/mol),the potential well is too shallow to form stable spontaneous polarization.It was specu-lated therefore,the formation of spontaneous polarization in these materials should include some ex-ternal factors.</p> <br/>Acta Physica Sinica. 1999 48(10): 1930-1937. Published 1999-05-05 VARIATION OF INTERCHAIN POTENTIAL DURING MOLECULAR CHAIN ROTATION IN POLY (VINYLIDENE FLUORIDE) XU JING, LI JIE 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1930-1937. article doi:10.7498/aps.48.1930 10.7498/aps.48.1930 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1930 1930-1937 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1938 Author(s): XIE ZUN, AN ZHONG, LI YOU-CHENG <br/><p>In consideration of the influence of a planar polythiophene configuration,we study the localized vibrational modes around an electronics bipolaron by using a two-dimensional SSH model.Fifteen lo-calized vibrational modes have been found,among them,four infrared active localized vibrational modes and four Raman active ones could be used to interpret the four observed intense infrared ab-sorption lines at 1020,1120,1200 and 1323 cm-1,and the four Raman active absorption peaks at 700,1047,1175 and 1220 cm-1,respectively.</p> <br/>Acta Physica Sinica. 1999 48(10): 1938-1943. Published 1999-05-05 Author(s): XIE ZUN, AN ZHONG, LI YOU-CHENG <br/><p>In consideration of the influence of a planar polythiophene configuration,we study the localized vibrational modes around an electronics bipolaron by using a two-dimensional SSH model.Fifteen lo-calized vibrational modes have been found,among them,four infrared active localized vibrational modes and four Raman active ones could be used to interpret the four observed intense infrared ab-sorption lines at 1020,1120,1200 and 1323 cm-1,and the four Raman active absorption peaks at 700,1047,1175 and 1220 cm-1,respectively.</p> <br/>Acta Physica Sinica. 1999 48(10): 1938-1943. Published 1999-05-05 TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES OF POLYTHIOPHENE AROUND AN ELECTRONIC BIPOLARON XIE ZUN, AN ZHONG, LI YOU-CHENG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1938-1943. article doi:10.7498/aps.48.1938 10.7498/aps.48.1938 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1938 1938-1943 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1944 Author(s): ZHOU YUN-SONG, QU XIAO-FENG, LIN DUO-LIANG <br/><p>VCE method was extended to treat antiferromagnetic-paramagnetic transition,so that it is not only able to calculate the Curie temperature but also the Neel temperature.The formulas for calculat-ing critical temperatures of random-bound layered Ising model,which describes the phase transition in magnetic alloy film,were provided.Some Tc-χ phase diagrams for magnetic alloy film were investi-gated and discussed.</p> <br/>Acta Physica Sinica. 1999 48(10): 1944-1949. Published 1999-05-05 Author(s): ZHOU YUN-SONG, QU XIAO-FENG, LIN DUO-LIANG <br/><p>VCE method was extended to treat antiferromagnetic-paramagnetic transition,so that it is not only able to calculate the Curie temperature but also the Neel temperature.The formulas for calculat-ing critical temperatures of random-bound layered Ising model,which describes the phase transition in magnetic alloy film,were provided.Some Tc-χ phase diagrams for magnetic alloy film were investi-gated and discussed.</p> <br/>Acta Physica Sinica. 1999 48(10): 1944-1949. Published 1999-05-05 CALCULATION OF THE PHASE DIAGRAM FOR MAGNETIC ALLOY FILM ZHOU YUN-SONG, QU XIAO-FENG, LIN DUO-LIANG 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1944-1949. article doi:10.7498/aps.48.1944 10.7498/aps.48.1944 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1944 1944-1949 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1950 Author(s): NING ZHAO-YUAN, CHENG SHAN-HUA <br/><p>The etching properties of amorphous hydrogenated carbon films deposited from benzene vapor in a multipole electron cyclotron resonance (ECR) plasma-enhanced chemical vapor deposition system have been investigated.Etch rates of these carbon films as a function of the process variables,includ-ing gas pressure and microwave power were measured,and compared with other resist materials.The results show that the film has high etching resistance against oxygen,and etch rate of the film not only closely correlated with etching process parameters,but also with the deposition conditions.This film could be used as a resist in dry etching process.</p> <br/>Acta Physica Sinica. 1999 48(10): 1950-1956. Published 1999-05-05 Author(s): NING ZHAO-YUAN, CHENG SHAN-HUA <br/><p>The etching properties of amorphous hydrogenated carbon films deposited from benzene vapor in a multipole electron cyclotron resonance (ECR) plasma-enhanced chemical vapor deposition system have been investigated.Etch rates of these carbon films as a function of the process variables,includ-ing gas pressure and microwave power were measured,and compared with other resist materials.The results show that the film has high etching resistance against oxygen,and etch rate of the film not only closely correlated with etching process parameters,but also with the deposition conditions.This film could be used as a resist in dry etching process.</p> <br/>Acta Physica Sinica. 1999 48(10): 1950-1956. Published 1999-05-05 ETCHING PROPERTIES OF AMORPHOUS HYDROGENATED CARBON FILMS IN A MULTIPOLE ELECTRON CYCLOTRON RESONANCE OXYGEN PLASMA SYSTEM NING ZHAO-YUAN, CHENG SHAN-HUA 1999-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(10): 1950-1956. article doi:10.7498/aps.48.1950 10.7498/aps.48.1950 Acta Physica Sinica 48 10 1999-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.48.1950 1950-1956