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Self-trapping and Self-focusing of Light Beams in Uniaxial Crystals

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Chinese Journal of Lasers 1996年第4期B5卷 313-318页

作者： GUO Qi(Institute of quantum Electronics,south china normal university,{2., china) south china {2. Univ Guangzhou China

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Ｓｅｌｆ－ｔｒａｐｐｉｎｇａｎｄＳｅｌｆ－ｆｏｃｕｓｉｎｇｏｆＬｉｇｈｔＢｅａｍｓｉｎＵｎｉａｘｉａｌＣｒｙｓｔａｌｓ￥ＧＵＯＱｉ（ＩｎｓｔｉｔｕｔｅｏｆＱｕａｎｔｕｍＥｌｅｃｔｒｏｎｉｃｓ，ＳｏｕｔｈＣｈｉｎａＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｇｕ...

关键词： self-trapping self-focusing uniaxial crystal

MB_8^(2.) (M=Be,Mg,Ca,Sr,and Ba):Planar octacoordinate alkaline earth metal atoms enclosed by boron rings

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Science china chemistry 2010年第8期53卷 1737-1745,1829-1832页

作者： PU ZhiFeng1,GE MaoFa1 & LI QianShu2.1State Key Laboratory for Structural chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of chemistry,Chinese Academy of Sciences,Beijing 100190,{2. 2.3} for computational quantum chemistry,south china normal university,guangzhou 510631,{2. State Key Laboratory for Structural chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of chemistry Chinese Academy of Sciences Beijing China center for computational {2. chemistry South China Normal University Guangzhou China

Complexes involving planar octacoordinate alkaline earth metal atoms in the centers of eight-membered boron rings have been investigated by two density functional theory (DFT) ***82.with D8h symmetry is predicted to be stable,both geometrically and electronically,since a good match is achieved between the size of the central beryllium atom and the eight-membered boron *** contrast,the other alkaline earth metal atoms cannot be stabilized in the center of a planar eight-membered boron ring because of their large *** following the out-of-plane imaginary vibrational frequency,pyramidal C8v MgB82.,CaB82.,SrB82.,and BaB82.structures are *** presence of delocalized π and σ valence molecular orbitals in D8h BeB82.gives rise to aromaticity,which is reflected by the value of the nucleus-independent chemical *** D8h BeB82.structure is confirmed to be the global minimum on the potential energy surface.

关键词： density functional theory octacoordinate alkaline earth metal aromatic molecular orbital

维普期刊数据库

On the diophantine equation X^2.(1+a^2.Y^4 =-2.

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Science china Mathematics 2010年第8期53卷 2143-2158页

作者： YUAN PingZhi 1 & ZHANG ZhongFeng 2.1 School of Mathematics,south china normal university,guangzhou 510631,{2. 2.School of Mathematics & computational Science,Sun Yat-Sen university,guangzhou 5102.5,{2. School of Mathematics South China Normal University Guangzhou China School of Mathematics & computational Science Sun Yat-Sen University Guangzhou China

Let a≥1 be an *** this paper,we will prove the equation in the title has at most three positive integer solutions.

关键词： algebraic approximations continued fractions elliptic curves quartic equations

维普期刊数据库

Fundamental　Soliton　Compression　due　to　Induced－phase－modulation　in　the　Regime　of　normal　Group－velocity　Dispersion

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Chinese Journal of Lasers 1995年第4期B4卷 335-342页

作者： XU Wencheng LIU Junmin LIAO Changjun, LIU Songhao(Institute of quantum electronics,south {2. normal university,guangzhou, 510631, {2.) south china {2. Univ Guangzhou China

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ＦｕｎｄａｍｅｎｔａｌＳｏｌｉｔｏｎＣｏｍｐｒｅｓｓｉｏｎｄｕｅｔｏＩｎｄｕｃｅｄ－ｐｈａｓｅ－ｍｏｄｕｌａｔｉｏｎｉｎｔｈｅＲｅｇｉｍｅｏｆＮｏｒｍａｌＧｒｏｕｐ－ｖｅｌｏｃｉｔｙＤｉｓｐｅｒｓｉｏｎ￥ＸＵＷｅｎｃｈｅｎｇ；ＬＩＵＪｕｎｍｉｎ；ＬＩ...

关键词： soliton compression cross-phase-modulation distributed compressor

Pulse Self-trapping Robustness to Polarization Mode Dispersion in Optical Fiber

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Chinese Journal of Lasers 2002年第2期11卷 71-75页

作者： CHEN Weicheng XU Wencheng LUO Aiping CUI HuCHEN Yongzhu LIU Songhao(Intitute of quantum Electronics, south china normal university, {2., china) quantum Electronics South China Normal University Guangzhou 510631

In this paper, pulse self-trapping robustness to polarization mode dispersion in optical fibers is studied. Nonlinear pulse can be used to suppress PMD despite the input pulse shapes is found. When the nonlinear effect is stronger (initial pulse amplitude is larger), the suppression degree to PMD is better. As the initial chirp is considered, we find that the chirp is harmful to suppress PMD. The more is initial chirp, the more is the PMD value.

关键词： optical fiber communication polarization mode dispersion soliton self-trapping birefringent fiber

Enhanced Compression of Fundamental Solitons in Dispersion Decreasing Fibers with Negative Third-order Dispersion Ⅱ. Effects of Fiber Characteristics and Initial Soliton Width

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Chinese Journal of Lasers 2001年第6期10卷 66-72页

作者： CAO Wenhua (Department of Electronic \%&\% Information Engineering, Wuyi university, Jiangmen 52.02., china) GUO Qi LIU Songhao (Institute of {2. Electronics, south china normal university, guangzhou 510631, china) 五邑大学电子与信息工程系广东江门 529020 华南师范大学量子电子学所广东广州 510631

Previous work have shown that the combined effects of negative third-order dispersion (TOD) and Raman self-scattering (RSS) can significantly enhance soliton compression in dispersion decreasing fibers (DDFs). In this paper, the effects of the negative TOD coefficient and the effective amplification of DDF′s on the performance of soliton compression are investigated. It is shown that for a given initial soliton width and a given effective amplification, there exists an optimum value of the negative TOD coefficient of the DDF at which the enhancement in soliton compression is maximum. It is also shown that the compression enhancement saturates when the effective amplification exceeds a certain value, which has been explained as a compromise between the higher-order effects induced increase of the ratio of input to output group-velocity dispersion coefficients of the DDF and the TOD induced non-adiabatic compression characteristics. The dependence of the compression enhancement on the initial soliton width have also be studied and the scheme is found works well for solitons with initial widths less than 3 ps.

关键词： fundamental solitons pulse compression dispersion decreasing fibers third-order dispersion Raman self-scattering

Atomic Force Microscopy-based Cell Nanostructure for Ligand-conjugated quantum Dot Endocytosis

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Acta Biochimica et Biophysica Sinica 2006年第9期38卷 646-652页

作者： Yun-Long PAN~1* Ji-Ye CAI~2.Li QIN~3 Hao WANG~4 1 The First Affiliated Hospital of Jinan university,guangzhou 510632.{2. 2.College of Life Science and Technology,Jinan university,guangzhou 510632.{2. 3 Department of Histology and Embryology,Medical College of Jinan university,guangzhou 510632.{2. 4 Information and Optoelectronic Science and Engineering.south china normal university,guangzhou 510631,{2. The First Affiliated Hospital of Jinan universityguangzhou 510632 China College of Life Science and Technology Jinan UniversityGuangzhou 510632 China Department of Histology and Embryology Medical College of Jinan UniversityGuangzhou 510632 China School for Information and Optoelectronic Science and Engineering South China Normal UniversityGuangzhou 510631 China

While it has been well demonstrated that quantum dots (QDs) play an important role inbiological labeling both in vitro and in vivo,there is no report describing the cellular nanostructure basis ofreceptor-mediated ***,nanostructure evolution responses to the endocytosis of transferrin(Tf)-conjugated QDs were characterized by atomic force microscopy (AFM).AFM-based nanostructureanalysis demonstrated that the Tf-conjugated QDs were specifically and tightly bound to the cell receptorsand the nanostructure evolution is highly correlated with the cell membrane receptor-mediated ***,confocal microscopic and flow cytometry results have demonstrated the specificity anddynamic property of Tf-QD binding and *** found that the internalization of Tf-QD is linearlyrelated to ***,while the nanoparticles on the cell membrane increased,the endocytosis was stillvery active,suggesting that QD nanoparticles did not interfere sterically with the binding and function ***,ligand-conjugated QDs are potentially useful in biological labeling of cells at a nanometerscale.

关键词： quantum dot endocytosis nanostructure atomic force microscopy