检索结果-内蒙古大学图书馆

Design of a High-Nonlinearity Single-Mode Holey Fiber with Flattened Dispersion around 800 nm

Chinese Physics Letters 2009年第11期26卷 78-80页

作者：王伟侯蓝田刘兆伦周桂耀 Institute of Infrared Optical Fibres and Sensors Yanshan University Qinhuangdao 066004 Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004

We numerically demonstrate a high-nonlinearity single-mode holey fiber with flattened dispersion around the Ti-Za laser band at 800 nm. The dispersion profile of the fiber has the shape of a quadratic curve, which reaches its maximum 5.96 ps·km^-1·nm^-1 at 800hm and its minimum -0.897 ps·km^-1·nm^-1 at both 750 and 850 nm. The nonlinear coefficient is 170 W^-1 km^-1 at 800nm and no higher order modes exit. A six-layer air-hole cladding ensures a loss less than 0.067 db/m in the 750 to 850 nm range. Two more air-hole rings will reduce the loss to below 0.1 db/km.

关键词： Chinese climate network complex systems small world community

来源：评论

学校读者我要写书评

暂无评论

Anomalous shift of the beating nodes in illumination-controlled In1−xGaxAs/In1−yAlyAs two-dimensional electron gases with strong spin-orbit interaction

引用

Physical Review B 2010年第19期81卷 195312-195312页

作者： W. Z. Zhou T. Lin L. Y. Shang G. Yu K. H. Gao Y. M. Zhou L. M. Wei L. J. Cui Y. P. Zeng S. L. Guo J. H. Chu Key Laboratory of Polar Materials and Devices Ministry of Education East China Normal University Shanghai 200062 People’s Republic of China College of Physics Science and Technology Guangxi University Nanning Guangxi 530004 People’s Republic of China National Laboratory for Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 People’s Republic of China Novel Materials Laboratory Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 People’s Republic of China

The beating patterns in the Shubnikov-de Haas oscillatory magnetoresistance originating from zero-field spin splitting of two-dimensional electron gases (2DEGs) in In0.52Al0.48As/InxGa1−xAs/In0.52Al0.48As quantum wells with silicon δ doped on the upper barrier layer have been investigated by means of magnetotransport measurements before and after illumination. Contrary to the expectation, after each illumination, the beating nodes induced by the zero-field spin-splitting effect shift to lower and lower magnetic field due to the decrease in the zero-field spin-splitting energy of the 2DEGs. The anomalous phenomenon of the shift of the beating nodes and the decrease in spin-orbit coupling constants after illumination cannot be explained by utilizing the previous linear Rashba model. It is suggested that the decrease in the zero-field spin-splitting energy and the spin-orbit coupling constant arise from the nonlinear Rashba spin splitting.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optical property of amorphous semiconductor mercury cadmium telluride from first-principles study

引用

science China(Technological sciences) 2009年第7期52卷 1928-1932页

作者： WANG Liang CHEN XiaoShuang LU Wei HUANG Yan WANG XiaoFang ZHAO JiJun National Laboratory for Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China State Key Laboratory of Materials Modification by Laser Electronand Ion BeamsSchool of Physics and Optoelectronic Technology and College of Advanced Science and TechnologyDalian University of TechnologyDalian 116024China

The structural and optical properties of amorphous semiconductor mercury cadmium telluride (a-MCT) are obtained by the first principles calculations. The total pair distribution functions and the density of states show that the a-MCT has the semiconductor characteristic. The calculated results of dielectric function show that E2 peak of the imaginary of dielectric function for the crystal mercury cadmium telluride abruptly disappears in the amorphous case due to the long-range disorders. And the imaginary of dielectric function of a-MCT shows a large broad peak, which is in agreement with the available results of other amorphous semiconductors. From the linear extrapolation of the curve ωε 2(ω)1/2 versus ω, it can be obtained that the optical energy gap of amorphous semiconductor Hg0.5Cd0.5Te is 0.51±0.05 eV.

关键词： first-principles calculations optical property dielectric function absorption coefficient

来源：评论

学校读者我要写书评

暂无评论

The linear and nonlinear optical effects of white light

引用

science China(Physics,Mechanics & Astronomy) 2009年第5期52卷 649-664页

作者： QI XinYuan LIU SiMin GUO Ru LU Yi GAO YuanMei LIU ZhaoHong HUANG ChunFu ZHANG XiaoHua ZHU Nan XU JingJun Photonics Center Institute of PhysicsNankai UniversityThe Key Laboratory of Weak Light Nonlinear PhotonicsMinistry of EducationTianjin 300071China Teda Applied Physics School Nankai UniversityThe Key Laboratory of Weak Light Nonlinear PhotonicsMinistry of EducationTianjin 300457China School of Automatic Engineering of Tianjin University of Technology Tianjin 300191China College of Physics and Electronics of Shandong Normal University Jinan 250014China College of Science Shandong Jianzhu UniversityJinan 250101China Tianjin Normal University Tianjin 300384China National Laboratory for Infrared Physics Shanghai 200083China

An overview of our research group’s experimental and theoretical developments is provided on the linear and nonlinear optical effects of white light since 2003. Their work includes the experimental researches on the white light one-dimensional photovoltaic dark spatial solitons and the waveguides and directional couplers induced by them, the circular and elliptic white-light dark spatial solitons and the white-light photorefractive phase masks, two-dimensional white-light photonic lattices and the applications of the white-light dark spatial solitons in the digital image transmission field, the interaction between the two-dimensional white-light dark spatial solitons to enhance or to improve the correlated degree of the white light through the interaction between the white-light beam and coherent dark spatial solitons, the interaction between the one- or two-dimensional white-light dark spatial solitons and the two-dimensional white-light photonic lattices, respectively. We also numerically simulate the interaction between two or more partially incoherent bright spatial solitons and the white bright spatial soliton pairs in the saturated logarithmic nonlinear medium. We have observed experimentally for the first time, the modulation instability of the coherent light and white light, respectively, in self-defocusing medium and so on.

关键词： white-light linear nonlinear spatial soliton

来源：评论

学校读者我要写书评

暂无评论

The effects of local disorder on the electronic structures of amorphous semiconductor GaAs

The effects of local disorder on the electronic structures o...

引用

International Conference on infrared and Millimeter Waves

作者： L. Wang X.S. Chen Y. Huang W. Lu J.J. Zhao National Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy and Sciences Shanghai China State Key Laboratory of Materials Modification by Laser Electron and Ion Beams School of Physics and Optoelectronic Technology and College of Advanced Science and Technology Dalian University of Technology Dalian China

The structure of amorphous compound semiconductor has been constructed successfully by ldquocontinuous random networksrdquo (CRN). Based on the first-principles calculations, the effects of different local disorder on density of states are studied in detail. The results show that the wrong bonds mainly have effect on the deeper energy band and introduce new electron states, and the dangling bonds mainly influence on the edge of energy gap and provide new electron states. In addition, anion and cation disorders (wrong bonds or dangling bonds) have distinguishing effect on density of states.

关键词： Amorphous semiconductors Gallium arsenide Electrons Physics Materials science and technology Amorphous materials Laboratories Chemicals Optical materials Semiconductor materials

来源：评论

学校读者我要写书评

暂无评论

Wavelength conversion properties of Er3+-doped cadmium silicate glasses

引用

Guangdianzi Jiguang/Journal of Optoelectronics Laser 2009年第1期20卷 49-51页

作者： Song, Zhao-Yuan Hou, Lan-Tian Chen, Yue-E Liu, Xiao-Dong Zhao, Xing-Tao Han, Ying Dong, Shi-Rui Zhou, Gui-Yao Key Laboratory of Metastable Material Science and Technology Yanshan University Qinhuangdao 066004 China Institute of Infrared Optical Fibers and Sensors Yanshan University Qinhuangdao 066004 China College of Science Tianjin Polytechnic University Tianjin 300160 China

The glass samples of SiO2-Al2O3- CdO-Li2O-K2O-Na2O with different Er3+-doped concentration are fabricated by high-temperature solid-state reaction method, and the absorption spectra as well as emission spectra are tested. The results indicate that when the glass samples are excitated at 365 nm laser with emitting green light, the intensities of the emission peaks along with the enhancement of the Er3+-doped concentration increase firstly, then decrease, and finally go up. And when the glass samples are excitated at 488 nm laser with emitting red green of 713 nm besides green light, the intensities of the emission peaks are almost the same when the Er3+-doped concentration is 0.2 mol and 0.4 mol. We can obtain high-intensity fluorescent emission by adjusting the Er3+-doped concentration.

关键词： Glass

来源：评论

学校读者我要写书评

暂无评论

Anti-Stokes Line in an Index-Guiding Photonic Crystal Fibre with Two Zero-Dispersion Wavelengths

引用

Chinese Physics Letters 2008年第6期25卷 2055-2057页

作者：王伟高飞侯蓝田周桂耀 Institute of Infrared Optical Fibers and Sensors Yanshan University Qinhuangdao 066004 Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004

An index-guiding photonic crystal fibre with a small hole in the core is fabricated. The simulated results show that the first higher order mode possesses two zero-dispersion wavelengths, and the phase-matching is possible in the anomalous dispersion regime between the two zero-dispersion wavelengths. Using 200 fs Ti： sapphire laser of 820, 830 and 840nm, the anti-Stokes line around 530nm can be generated efficiently. The maximum ratio of the anti-Stokes signal energy to the pump component in the output spectrum is estimated to be 1.03 and the conversion efficiency is above 50%.

关键词： MICROSTRUCTURED OPTICAL-FIBERS MULTIPOLE METHOD HOLEY FIBERS GENERATION EFFICIENT

来源：评论

学校读者我要写书评

暂无评论

Generation of Anti-Stokes Line in Fundamental Mode of Photonic Crystal Fibre

引用

Chinese Physics Letters 2008年第10期25卷 3682-3684页

A photonic crystal fibre （PCF） with zero-dispersion wavelength around 800 nm is designed and fabricated. Simulated results show that the zero-dispersion wavelength of fundamental mode for this PCF is at 826nm, and phase-matched four-wave mixing can be achieved in fundamental mode. Using 20ors Ti：sapphire laser with central wavelength at 810nm as pump, the anti-Stokes line around 610hm ＆ generated efficiently. The output signal has a Gaussian-like profile, which indicates that the anti-Stokes signal is in the fundamental mode of the PCF. The energy of anti-Stokes signal is higher than that of residual pump laser and the maximum ratio of the anti-Stokes signal to the pump component in the output spectrum is estimated to be 1.2.

关键词： the power-law exponents precipitation durative abrupt precipitation change

来源：评论

学校读者我要写书评

暂无评论

Down-conversion luminescence properties of Er3+-doped cadmium silicate glasses

Down-conversion luminescence properties of Er3+-doped cadmiu...

引用

Optoelectronic Materials and Devices III

作者： Zhao-Yuan, Song Lan-Tian, Hou Yue-E, Chen Xiao-Dong, Liu Xing-Tao, Zhao Ying, Han Shi-Rui, Dong Institute of Infrared Optical Fibers and Sensors Yanshan University Qinhuangdao 066004 China Key Laboratory of Metastable Material Science and Technology Yanshan University Qinhuangdao 066004 China Institute of Optoelectronic Technology Dalian Nationalities University Dalian 116600 China

The cadmium silicate glass samples of 40SiO2-14Al 2O3-(40-x) CdO-2Li2O-2K2O-2Na 2O-xEr2O3 (x=0.15, 0.20, 0.25, 0.30, 0.35, 0.40 mol) was prepared by high-temperature solid-state reaction method, and it is pumped at 488 nm, 532 nm and 800 nm respectively. The results indicate that the main peak wavelengths are at 547 nm, 731 nm and 1534 nm excited at 488 nm. The relationship of the intensity between the emission light of 731 nm and Er 3+-doped concentration is nonlinear. Near-infrared light nearby 1534 nm is excited at 532 nm and 800 nm, but it is weaker at 800 nm. The glass samples open a outlook of application for conversion luminescence materials. © 2008 SPIE.

关键词： Glass

来源：评论

学校读者我要写书评

暂无评论

Nonlinear optical and near-infrared luminescence properties of Nd 3+-doped heavy metal silicate glasses

Nonlinear optical and near-infrared luminescence properties ...

引用

Optoelectronic Materials and Devices III

作者： Zhao-Yuan, Song Lan-Tian, Hou Yue-e, Chen Xiao-Dong, Liu Xing-Tao, Zhao Ying, Han Shi-Rui, Dong Institute of Infrared Optical Fibers and Sensors Yanshan University Qinhuangdao 066004 China Key Laboratory of Metastable Material Science and Technology Yanshan University Qinhuangdao 066004 China Institute of Optoelectronic Technology Dalian Nationalities University Dalian 116600 China

The glass samples of SiO2-Al2O3-CdO-Li 2O-K2O-Na2O with different Nd 3+-doped concentration are prepared by hightemperature solid-state reaction method, and test the absorption spectrums as well as emission spectrum excited at 488 nm, 532 nm and 808 nm. The third-order optical nonlinear properties of glasses samples are investigated by the z-scan technique. With the increment of doping concentration of Nd3+, the third-order nonlinear refractive index and the absorption index increase, so it belongs to the self-focusing and reverse saturated absorption medium. The glass samples open a outlook of application for nonlinear optical medium and excellent luminescence materials. © 2008 SPIE.

关键词： Cadmium compounds

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：