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Chinese Physics Letters 2006年第4期23卷 868-870页

作者：孙飞余金中 National Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083

Modulation arms with different widths are introduced to Mach-Zehnder interferometers （MZIs） to obtain improved performance. Theoretical analysis and numerical simulation have shown that when tile widths of tile two arms are properly designed to achieve an inherent mπ/2 （m is an odd integer） optical phase difference between the arms, the asymmetric MZI presents higher modulation speed. Furthermore, the carrier-absorption induced divergence of insertion losses in silicon-on-insulator （SOI） based MZI optical switches can be obviously improved.

关键词： WAVE-gUIDE SWITCH THERMOOPTICAL SWITCH

Effect of Dielectric Constant Contrast and Filling Factor to Photonic Bandgap

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光学学报 2003年第S1期23卷 185-186页

作者： Qin Chen, Yong-Zhen Huang, Wei-Hua guo, Li-Juan Yustate Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912 state Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of SciencesP.O. Box 912

The effect of dielectric constant contrast and the filling factor to the photonic bandgap in a 2-D square lattice photonic crystal is discussed. The location, width and number of photonic bandgap can be modulated.

关键词： PBg in with et on Effect of Dielectric Constant Contrast and Filling Factor to Photonic Bandgap of

High Speed 2×2 Optical Switch in Silicon-on-Insulator Based on Plasma Dispersion Effect

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Chinese Physics Letters 2005年第12期22卷 3097-3099页

作者：孙飞余金中陈少武 National Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083

Based on free carrier plasma dispersion effect, a 2 × 2 optical switch is fabricated in a silicon-on-insulator substrate by inductively coupled-plasma techno.ogy and ion implantation. The device has a Mach-Zehnder interferometer structure, in which two directional couplers serve as the power splitter and combiner. The switch presents an insertion loss of 3.04 dB and a response time of 496ns.

关键词： WAVE-gUIDE SWITCH FAST-RESPONSE THERMOOPTICAL SWITCH MATRIX FABRICATION

The Fabrication and Characterization of Polarization Insensitive Semiconductor Optical Amplifier

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光学学报 2003年第S1期23卷 451-452页

作者： Lijuan Yu Weihua guo Chunlin Han Yong-Zhen Huang Xiaoyu Ma Manqing Tan state Key Lab. on Integrated Optoelectronics Institute of Semiconductors) Chinese Academy of Sciences Beijing 100083 China

An angled facet strained bulk IngaAs SOA has been designed and fabricated. A device with double-layer antireflection coatings had <2dB polarization sensitivity and <0.5dB gain ripple.

An angled facet strained bulk IngaAs SOA has been designed and fabricated. A device with double-layer antireflection coatings had gain ripple.

关键词： polarization sensitivity antireflection coatings

不同结构SOI交叉波导的损耗及串扰特性研究(英文)

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光子学报 2006年第11期35卷 1649-1653页

作者：孙飞陈少武余金中中国科学院半导体研究所集成光电子国家重点联合实验室北京100083

利用高阶Pade近似的2D-BPM算法,对具有不同弯曲半径及交叉角度的SOI弯曲交叉波导的传输特性进行了模拟、分析和深入研究,发现交叉波导的串扰随弯曲半径及交叉角度增大而减小的规律.在此基础上,对由正弦弯曲、余弦弯曲以及圆弧弯曲三种... 详细信息

利用高阶Pade近似的2D-BPM算法,对具有不同弯曲半径及交叉角度的SOI弯曲交叉波导的传输特性进行了模拟、分析和深入研究,发现交叉波导的串扰随弯曲半径及交叉角度增大而减小的规律.在此基础上,对由正弦弯曲、余弦弯曲以及圆弧弯曲三种弯曲波导构成的SOI交叉波导的损耗及串扰特性进行了分析比较.结果表明,由正弦弯曲构成的交叉波导传输损耗最小且串扰最小.

关键词：导波光学 SOI 交叉波导弯曲波导

New Eulerian-Lagrangian Method for Salinity Calculation

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China Ocean Engineering 2001年第4期16卷 553-564页

作者：朱首贤丁平兴沙文钰冯芒张文静 state Key Laboratory of Estuarine and Coastal research East China Normal UniversityShanghai 200062 China；Meteorology Institule of the PLA4 ScienceandEngineeringUniversity Nanfing211101 China state Key Laboratory of Estuarine and Coastal research East China Normal UniversityShanghai 200062 China Meteorology Institule of the PLA4 ScienceandEngineeringUniversity Nanfing211101 China

A difference scheme in curvilinear coordinates is put forward for calculation of salinity in estuaries and coastal waters, which is based on Eulerian-Lagrangian method. It combines first-order and second-order Lagrangian interpolation to reduce numerical dispersion and oscillation. And the length of the curvilinear grid is also considered in the interpolation. Then the scheme is used in estuary, coast and ocean model, and several numerical experiments for the Yangtze Estuary and the Hangzhou Bay are conducted to test it. These experiments show that it is suitable for simulations of salinity in estuaries and coastal waters with the models using curvilinear coordinates.

关键词： convection-dispersion Eulerian-Lagrangian method Lagrangian interpolation curvilinear coordinates

A no.el Technique to Measure gain Spectrum for Fabry-Pérot Semiconductor Lasers

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光学学报 2003年第S1期23卷 331-332页

作者： Wei-Hua guo, Qiao-Yin Lu, Yong-Zhen Huang, Chun-Lin Han, Li-Juan Yu state Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China, Tel: 010-82304524, E-mail: gwh@*** state Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences P.O. Box 912 Beijing 100083 China

A no.el gain measurement technique based on the integration of the measured amplified spontaneous emission spectrum multiplying a phase function over one longitudinal mode interval is proposed for Fabry-Perot semicond... 详细信息

关键词： for of ab in ASE rot Semiconductor Lasers A no.el Technique to Measure gain Spectrum for Fabry-P

Rotational Property of^(249)Cm in Particle-Triaxial-Rotor Model

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Communications in Theoretical Physics 2012年第2期57卷 271-275页

作者：庄凯李则博刘玉鑫 Department of Physics and state Key Laboratory of Nuclear Physics and Techno.ogy Peking UniversityBeijing 100871China

We study the particle-triaxial-rotor model rotational energy spectrum and with variable moment of inertia deformation feature of very heavy nucleus 249Cm in the band structure and high spin states and locating very near the we determine the configurations and quadrupole and triaxial calculated results indicate that the high spin band of 249Cm is Such a nucleus is the unique one involving both multisuperheavy region. By calculating the energy spectrum, deformation parameters β and γ of the nucleus. The built upon the v[620]1/2＋ configuration with deformation 1- configuration respectively parameters β= 0.296 and γ = 7.5° and the bands based on the v[622]3/2＋,v[613]7/2＋, v[750]1/2- are also the ones with quite large axial deformation but small triaxial deformation.

关键词： near superheavy nucleus energy spectrum deformation parameters particle-triaxial-rotor model

Theoretical Study on Properties of New Isotope 265Bh

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Communications in Theoretical Physics 2006年第4期45卷 681-686页

作者： ZHANg Hong-Fei ZUO Wei LI Jun-Qing Soojae Im MA Zhong-Yu CHEN Bao-Qju Institute of Modern Physics the Chinese Academy of Sciences Lanzhou 730000 China graduate School of＇the Chinese Academy of Sciences Beijin 100049 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Institut für Theoretische Physik Justus-Liebig-Universitaet Heinrich-Buff-Ring 16 D 35392 Giessen Germany China Institute of Atomic Energy Beijing 102413 China

The properties of nuclei belonging to the newly observed α-decay chain starting from ^265Bh have been studied. The axially deformed relativistic mean-field calculation with the force NL-Z2 has been performed in the blocked BCS approximation. Some ground state properties such as binding energies, deformations, spins, and parities, as well as Q-values of the a-decay for this decay chain have been calculated and compared with kno.n experimentai data. good agreement is found. The slngle-particle spectrum of the nucleus ^265Bh is studied and some new magic numbers are found, while the magnitudes of the shell gaps in superheavy nuclei are much smaller than those of nuclei before the actinium region, and the Fermi surfaces are close to the continuum. Thus the superheavy nuclei are usually no. stable. The a-decay lifetimes in the ^265Bh decay chain are evaluated by different formulae, and compared with experimental data. The methods which give good agreement with the data are selected.

关键词： relativistic mean field superheavy nuclei binding energy lifetimes

Collective Perspective on Advances in Dyson–Schwinger Equation QCD

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Communications in Theoretical Physics 2012年第7期58卷 79-134页

作者： Adnan Bashir Ian C.Clet Bruno.El-Bennich Craig D.Roberts Peter C.Tandy Instituto de Física y Matemticas Universidad Michoacana de San Nicols de Hidalgo Edificio C-3Ciudad UniversitariaMoreliaMichoacn 58040Mxico Physics Division Argonne National Laboratory ArgonneIllinois 60439USA Center for Nuclear research Department of PhysicsKent State UniversityKent OH 44242USA CSSM and CoEPP School of Chemistry and Physics University of AdelaideAdelaide SA 5005Australia Laboratorio de Física Teórica e Computao Científica Universidade Cruzeiro do Sul01506-000 So PauloSPBrazil Instituto de Física Torica Universidade Estadual Paulista01140-070 So PauloSPBrazil Department of Physics Center for High Energy Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking University Institut für Kernphysik Forschungszentrum JülichD-52425 JülichGermany Department of Physics Illinois Institute of TechnologyChicagoIllinois 60616-3793USA

We survey contemporary studies of hadrons and strongly interacting quarks using QCD's Dyson-Schwinger equations, addressing the following aspects: confinement and dynamical chiral symmetry breaking; the hadron spectrum; hadron elastic and transition form factors, from small-to large-Q2; parton distribution functions; the physics of hadrons containing one or more heavy quarks; and properties of the quark gluon plasma.

关键词： confinement dynamical chiral symmetry breaking Dyson-Schwinger equations hadron spectrum hadron elastic and transition form factors heavy mesons in-hadron condensates parton distribution functions quark gluon plasma UA(1)-problem