检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

非厄米哈密顿量的物理意义

物理学报 2003年第11期52卷 2683-2686页

作者：陈增军宁西京复旦大学现代物理研究所上海200433

分析了一个脉冲激光与原子相互作用的四能级系统 ,并考虑最上层能级的自电离过程 ,从而引入非厄米哈密顿量 .在缀饰原子模型下 ,通过直接求解此哈密顿量的本征值与本征函数 ,得到系统布居的演化函数 .与数值方法所得演化函数的对比表明... 详细信息

分析了一个脉冲激光与原子相互作用的四能级系统 ,并考虑最上层能级的自电离过程 ,从而引入非厄米哈密顿量 .在缀饰原子模型下 ,通过直接求解此哈密顿量的本征值与本征函数 ,得到系统布居的演化函数 .与数值方法所得演化函数的对比表明二者相当符合 ,从而肯定了非厄米哈密顿量在量子力学框架中的地位 ,并得到其本征值虚部的物理意义 .这将使传统量子力学中力学量的定义得以拓展 .

关键词：非厄米哈密顿量四能级系统缀饰原子模型本征值本征函数量子力学力学量算符

Main chemical ingredients of the celadon glaze from Qingliangsi kiln and Zhanggongxiang kiln

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2006年第4期49卷 487-495页

作者： ZHAO Weijuan1, LU Xiaoke1, LI Guoxia1, GUO Min1, XIE Jianzhong1, GAO Zhengyao1, SUN Xinmin2, GUO Musen2, CHENG Huansheng3 & ZHANG Bin3 1. Faculty of Physical Engineering, Zhengzhou university, Zhengzhou 4.0052, china 2. Research Institute of Cultural Relic and Archaeology, Henan Province, Zhengzhou 4.0004. china 3. Research Institute of modern {4., fudan university, shanghai 2004.3, china Faculty of Physical Engineering Zhengzhou University Zhengzhou China Research Institute of Cultural Relic and Archaeology Zhengzhou China Research Institute of modern physics Fudan University Shanghai China

The proton induced X-ray emission (PIXE) is used to determine the chemical ingredients of seven main elements in the samples of Ru Guan porcelain glazes and Ru Civil porcelain from Qingliangsi kiln in Baofeng County and the samples of celadon glaze from Zhanggongxiang kiln in Ruzhou City. The PIXE data are then analyzed by scatter analysis and fuzzy cluster method for determining their classification and provenance. The results show that there are obvious differences between the ingredients of glaze material of Ru Guan porcelain and Ru Civil porcelain from Qingliangsi kiln, of which the former ingredients are stable and its source is localized, and that the sources and ingredients of the glaze of Ru Guan porcelain and those of celadon glaze from Zhanggongxiang kiln are not wholly the same, of which the latter sources are much scattering.

关键词： Zhanggongxiang kiln, Qingliangsi kiln, the source of raw material, the proton induced X-ray emission.

Polarization Spectral Hole-Burning in Organic Materials

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 1995年第2期B4卷 151-159页

作者： YIN Yu ZHAO Youyuan LUO Xiao CHEN Lingbing LI Fuming(Opening Loboratory for Materials Modification by Laser, Ion and Electron Beams,Department of physics, fudan university, shanghai 2004.3, china) fudan Univ Shanghai China

ＰｏｌａｒｉｚａｔｉｏｎＳｐｅｃｔｒａｌＨｏｌｅ－ＢｕｒｎｉｎｇｉｎＯｒｇａｎｉｃＭａｔｅｒｉａｌｓ￥ＹＩＮＹｕ；ＺＨＡＯＹｏｕｙｕａｎ；ＬＵＯＸｉａｏ；ＣＨＥＮＬｉｎｇｂｉｎｇ；ＬＩＦｕｍｉｎｇ（ＯｐｅｎｉｎｇＬｏ... 详细信息

ＰｏｌａｒｉｚａｔｉｏｎＳｐｅｃｔｒａｌＨｏｌｅ－ＢｕｒｎｉｎｇｉｎＯｒｇａｎｉｃＭａｔｅｒｉａｌｓ￥ＹＩＮＹｕ；ＺＨＡＯＹｏｕｙｕａｎ；ＬＵＯＸｉａｏ；ＣＨＥＮＬｉｎｇｂｉｎｇ；ＬＩＦｕｍｉｎｇ（ＯｐｅｎｉｎｇＬｏｂｏｒａｔｏｒｙｆｏｒＭａｔｅｒｉ...

关键词： spectral hole-burning optical storage

A Study on Uptake and Localization of Merocyanine 54. (MC54.) in Murine Myeloid Leukemia Cells by Confocal Laser Scanning Microscopy (CLSM)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 2000年第3期9卷 35-41页

作者： J. Y. Chen-1 N. H. Cheung-2 S. C. Chen-2, M. C. Fung-3 W. N. Leung-4.N. K. Mak- 4. ( -1Department of physics, fudan university, shanghai 2004.3, china -2Department of physics, Hong Kong Baptist university, Hong Kong, china -3Department of Bi 复旦大学上海香港浸会大学香港香港大学香港

The intracellular localization of merocyanine 54. (MC54.), a photosensitizer commonly used in the photo-inactivation of leukemia cells, was studied using confocal laser scanning microscopy. It was found for the first time that MC54. not only localized in the plasma membrane but also in the cytoplasm and the nuclear membrane of the murine myeloid leukemia M1 and WEHI 3B (JCS) cells. Exposure of MC54. treated leukemia cells to light under conditions that could cause photobleaching did not cause the redistribution of cell-bound MC54.. Rapid localization of MC54. in the cytoplasm was observed 5 minutes after exposure of leukemia cell to MC54., indicating that MC54. could promptly be internalized by these two leukemia cell lines. In contrast, localization of MC54. was limited only to the plasma membrane of erythrocytes. These results suggest that the binding pattern of MC54. is cell type dependent and may be related to the efficacy of photosenitization in photodynamic therapy.

关键词： merocyanine 54. Confocal Laser Scanning Microscopy Myeloid Leukemia cell

Studies on the microstructure,optical and electrical properties of organic microcavity devices based on a porous silicon reflector

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2005年第2期48卷 191-201页

作者： XIONG Zuhong1, FAN Yongliang2, ZHAN Yiqiang2, ZHANG Songtao2, DING Xunmin2 & HOU Xiaoyuan2 1. School of physics, Southwest china-Normal university, Chongqing 4.0715, china 2. Surface physics Laboratory (National Key Laboratory), fudan university, shanghai 2004.3, china School of physics Southwest China-Normal University Chongqing China Surface physics Laboratory (National Key Laboratory) Fudan University Shanghai China

A novel type of microcavity organic light-emitting diode based on a porous silicon distributed Bragg reflector (PS-DBR) has first been achieved and its microstructure, optical, and electrical properties have also been investigated in detail. The microcavity is made up of the central active organic multilayer sandwiched between a top silver film and a bottom PS-DBR, formed by electrochemical etching of p++-Si substrate. The field- emission scanning electron microscopy cross-section images show the nanometer-scale layered structure and flat interfaces inside the microcavity. The reflectivity (relative to an Al mirror) of the PS-DBR is up to 99%, and the stopband is about 160 nm wide. Resonant cavity mode appears as a tip in the reflectivity spectrum of the Si-based organic multilayer films, which is a symbol that the Si-based organic multilayer structure is indeed a microcavity. The peak widths of the electroluminescence (EL) spectra from the cavities emitting green and red light are greatly reduced from 85 nm and 70 nm to 8 nm and 12 nm, respectively, as compared with those measured from non-cavity structures. Note that the EL emission from the cavity devices is single-mode, and the off-resonant optical modes are highly suppressed. Moreover, increases of a factor of about 6 and 4.of the resonant peak intensity from the cavities emitting green and red light are also observed, respectively. In addition, the current-brightness-voltage characteristics and effect parameters on the lifetime of the cavity devices are also discussed. The present technique for obtaining enhanced EL emission from Si-based organic microcavity may also be another novel effective method for realizing Si-based optoelectronics device integration.

关键词： electrochemical etching, Si-based microcavity, electroluminescence, organic light-emitting diodes.

Femtosecond Nonlinear Birefringence and Dichroism in Au:TiO_2 Composite Films

在线全文

学校读者我要写书评

暂无评论

光学学报 2003年第S1期23卷 78-79页

作者： Guohong Ma Jun He Sing-Hai Tang Shixiong Qian Department of physics, National university of Singapore, Singapore 119260 Department of physics, fudan university, {4. 2004.3, P. R. china Department of physics National University of Singapore Singapore 119260 Department of physics Fudan University Shanghai 200433 P. R. China

Au:TiO2 nanocomposite film was fabricated by rf-sputtering. Both real and imaginary parts of x(3) were investigated by optical Kerr effect and pump-probe methods with femtosecond pulse with values of about 10-8 esu.

关键词： in on with TiO Femtosecond Nonlinear Birefringence and Dichroism in Au that real of

Preparation of InSb nanocrystals embedded in SiO_2 thin films

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第19期43卷 1610-1615页

作者： ZHU Kaigui 1, SHI Jianzhong 1, WEI Yanfeng 2 and ZHANG Lide 1 1. Institute of Solid State physics, Chinese Academy of Science, Hefei 230031, china 2. State Key Laboratory of Surface physics, fudan university, {4. 2004.3, china Institute of Solid State physics Chinese Academy of Science Hefei China State Key Laboratory of Surface physics Fudan University Shanghai China

InSb nanocrystals embedded in SiO 2 thin films were prepared by rf magnetron cosputtering technique. THe observation by transmission electron microscope showed that InSb nanocrystals dispersed uniformly in SiO-2 matrices. InSb nanocrystals with different sizes can be obtained by changing the annealing condition. The average size of InSb nanocrystals depended on annealing temperature and time, but not on the t 1/3 rules. X-ray photoelectron spectroscopy and X-ray diffraction were also applied to the analyses of the composite thin films.

关键词： InSb nanocrystals radio-frequency sputtering quantum confinement.

Electronic Structure Calculation for Co_6(μ_6-C)(μ_3-S)_2(CO)_(12) Cluster

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1997年第4期8卷 351-352页

作者： Wen LI Ye LIU Yuan Qi YIN( Lanzhou Institute of Chemical physics, Academia Sinica)(Research Center of Analysis and Measurement, fudan university, shanghai 2004.3) Res. Ctr. of Anal. and Measurement Fudan University Shanghai 200433 China Lanzhou Inst. of Chemical physics Academia Sinica Fudan University Shanghai 200433 China

The electronic Structure ofCo6(μ_6-C)(μ_3-S)_2(CO)_(12) molecule has been calculated by DV-Xα method. The results show that the reaction mechanism of CS_2 and Co2(CO)8 in synthsis seems only to undergo the additive and decarbonyl processes. The other result worthy of being mentioned is the calculated atonmic charges that are Co0.3+,S1.29+,μ6-Cl. 16-,C0.06- and O0.21-.S atom has not only the positive charge but also four times as much as that of Co atom. This is not in accordance with the electronegativihes of 1.7 and 2.5 respectively for Co and S atom

关键词： Co CO Cluster

Two-photon spectroscopic behaviors and photodynamic effect on the BEL-74.2 cancer cells of the new chlorophyll photosensitizer

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2008年第6期51卷 529-538页

作者： ZHAO PeiDe1,2,CHEN Ping1,TANG GuoQing1,LIU JinWei2,LIN Lie1,GUO Peng1,YU Qing2, YAO JianZhong3,MA DongMing4.ZHANG GuiLan1 & CHEN WenJu1 1 Key Laboratory of Optoelectronic Information Science and Technology,Ministry of Education,Institute of modern Optics,Nankai university,Tianjin 300071,china 2 Department of physics,Hebei university of Technology,Tianjin 30013.,china 3 College of Pharmacy,Second Military Medical university,shanghai 2004.3,china 4.Tianjin College of the Traditional Chinese Medicine,Tianjin 300193,china Key Laboratory of Optoelectronic Information Science and Technology Ministry of Education Institute of Modern Optics Nankai University Tianjin China Department of physics Hebei University of Technology Tianjin China College of Pharmacy Second Military Medical University Shanghai China Tianjin College of the Traditional Chinese Medicine Tianjin China

The spectroscopic properties of a new chlorophyll derivate photosensitizer (CDP) are studied under the excitation wavelengths at 800 and 4.0 nm using femtosecond pulses from a Ti: sapphire laser. The damaging effect of CDP on the BEL-74.2 cancer cells is also investigated upon two-photon illumination at 800 nm. The normalized fluorescence spectra of CDP in tetrahydrofuran (THF) show that two-photon and one-photon spectra have the same distributions and the same emission bands (675 nm). The lifetimes of two- and one-photon induced fluorescence of this molecule are of the order of 5.0 ns. By comparing the data it is shown that there is some difference between the two lifetimes, but the difference is less than one nanosecond. The two-photon absorption cross section of the molecule is also measured at 800 nm and estimated as about σ'_2 ≈ 31.5x10^(-50)cm^4.s·photon^(-1). The results of two-photon photodynamic therapy (TPPDT) tests show that CDP can kill all of the tested cancer cells according to the usual Eosine assessment. Our results indicate that the two-photon-induced photophysical, photochemical and photosensitizing processes of CDP may be basically similar to those of one-photon excitation. These behaviors of the sample suggest that one may find other possible methods to estimate some photosensitizers' effects in details such as their distribution in cells and the reactive targets of the sub-cellular parts of some tumor cells via two-photon excitation techniques.

关键词： photosensitizer chlorophyll derivate two-photon fluorescence two-photon absorption cross-section TPPDT BEL-74.2 cell