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Isomerization of B_6,B_6^- and B_6^+ clusters

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Science china {1. 2010年第1期53卷 202-209页

作者： WEI GongMin1,PU ZhiFeng2,ZOU Rong3,LI GuoLiang2,3 & LUO Qiong2,3 1Department of Physics,Capital normal university,Beijing 100048,china 2State Key Laboratory of Explosion Science and Technology Beijing institute of Technology,Beijing 100081,china 3center for computational quantum chemistry,south china normal university,guangzhou 51.631.china 1. Department of Physics Capital Normal University Beijing 100048 China2. State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China3. Center for Computational Quantum Chemistry South China Normal University Guangzhou 510631 China

The interconversions between isomers with the same spin multiplicity of neutral B6 and charged B6-and B6+ clusters have been investigated at the B3LYP/6-31.+G level of theory,including determination of the minimum energy pathways with transition states connecting the corresponding reactants and *** dynamic calculations,26 isomers were optimized,including 1. novel *** order to further refine the energies,single-point B3LYP/6-31.+G(3df) calculations were carried out on the corresponding B3LYP/6-31.+G geometries of all isomers of B6,B6-and B6+ and the corresponding isomerization transition *** stability of each isomer of B6(singlet and triplet states),B6-(doublet state) and B6+(doublet state) was analyzed from both thermodynamic and dynamic viewpoints.

关键词： B6 transition state intrinsic reaction coordinate barrier height

A cloud of laser cooled 40Ca+ in a linear ion trap

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Science Bulletin 2010年第Z2期 3094-3097页

作者： ZHOU Fei 1.2,XU YouYang 1.2,XIE Yi 1.2,GUO Bin 1.2,SHU HuaLin 3,LI JiaoMei 1.HUANG XueRen 1.&FENG Mang 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan institute of Physics and Mathematics,{1.,Wuhan 430071.china 2Graduate university of the {1.,Beijing 1.0049,china 3 School of Physics and Telecommunication Engineering,south china normal university,guangzhou 51.006,china

A cloud of 40Ca+is successfully trapped and cooled using the radiation of a red-detuned 397 nm laser beam and a resonant 866 nm laser beam in our prototype linear ion trap,which was designed and constructed for studying quantum information *** have characterized the size of the ion cloud,estimating the temperature to be in the order of milli-Kelvins.

关键词： ion trap laser cooling quantum information processing

Synthesis and properties investigation on Zn metal complex based on 8-hydroxyquinoline derivatives

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Synthesis and properties investigation on Zn metal complex b...

第1.届全国发光学学术会议

作者： WEI Jie-ping ZENG He-ping~* (south china normal university,{1. institute of Functional Molecule,School of chemistry,south china university of Technology,guangzhou 51.641.china)

Since Tang et al first used 8-hydroxyquinoline aluminium(Alq)complex as an emissive and electron transport material(ETM)for double Organic light emitting devices(OLED)in 1.87, organic material based on 8-hydroxyquinoline for OLED have attracted extensive interest for their high efficiency and potentially low production *** organic material for ETM ought to be high quantum efficiency,thermally robust emissive,readily processible,improved stability and durability of *** order to tune its emission colour and reduce the production technics, three zinc complexes of 8-hydroxyquinoline derivatives were designed and synthesized for ETM and hole transport material in *** novel compounds were determined by IR,H NMR, MS,UV-visible *** DSC-TG result shew that all the complexes were thermally stable with less than 1.％ weight-loss on the temperature 600℃ under *** fluorescence emission spectra was shown in figure *** the complexes had broad *** 1.and 2 almost had the same emission maximum in the range of 500～800 *** 3 had emission maximum that was blue shift 40 nm compared with Complexes 1.and *** the emission wavelength of them was red shifted compared with zinc complex of 2-methyl-quinolin-8-ol.

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来源： cnki会议评论

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原子激光传输的有效ABCD形式研究

物理学报 2004年第2期53卷 356-361页

作者：殷建玲刘承宜杨友源刘江范广涵华南师范大学激光运动医学实验室广州510631 香港教育学院科学系华南师范大学信息光电子科技学院广州510631

利用含适量子系统传播子的ABCD形式的理论 ,将品质因子守恒系统中的ABCD定律 ,推广到有效品质因子守恒的系统———原子激光的传输中 ,通过引入有效品质因子和有效参数qeff,利用Heisenberg图像得到传播子的有效ABCD形式 .由于原子激光... 详细信息

利用含适量子系统传播子的ABCD形式的理论 ,将品质因子守恒系统中的ABCD定律 ,推广到有效品质因子守恒的系统———原子激光的传输中 ,通过引入有效品质因子和有效参数qeff,利用Heisenberg图像得到传播子的有效ABCD形式 .由于原子激光内部原子间相互作用的存在 ,原有的品质因子不再守恒。

关键词：原子激光传输有效ABCD参数传播子品质因子守恒系统原子激光器量子力学薛定谔方程

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强激光束在等离子体通道中传输的变分法研究

物理学报 2004年第5期53卷 1419-1424页

作者：刘明伟郭弘邓冬梅张宇陈徐宗华南师范大学传输光学实验室广州510631 北京大学信息科学技术学院量子信息与测量教育部重点实验室北京100871

给出了低密度等离子体中包含高阶相对论效应的激光场传输方程 .用变分法研究了强激光束在等离子体通道中传输时包括真空衍射、等离子体通道和低阶与高阶相对论效应对传输的影响 .在傍轴近似下 ,激光束宽依然有“势阱”方程 .当激光强度... 详细信息

给出了低密度等离子体中包含高阶相对论效应的激光场传输方程 .用变分法研究了强激光束在等离子体通道中传输时包括真空衍射、等离子体通道和低阶与高阶相对论效应对传输的影响 .在傍轴近似下 ,激光束宽依然有“势阱”方程 .当激光强度较大时 ,高阶相对论效应变得重要 :它一方面减小激光束宽的振荡幅度 ,另一方面又加快激光束宽的振荡速度 .当激光功率大于 (等于 )相对论临界功率时 ,高阶相对论效应避免了激光强度随传输距离出现无穷大的奇异性 .同时 ,给出了考虑高阶相对论效应后激光束宽平衡解的存在条件 .

关键词：等离子体通道变分法高阶相对论激光束真空衍射傍轴近似

AlGaInP四元系材料渐变异质结及其在高亮度发光二级管器件中的应用

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物理学报 2003年第5期52卷 1264-1271页

作者：刘鲁范广涵廖常俊曹明德陈贵楚陈练辉华南师范大学信息光电子科技学院金属有机化合物气相沉积实验室广州510631 华南师范大学信息光电子科技学院量子电子研究所广州510631

引入渐变理论 ,通过建立AlGaInP四元系材料渐变异质结能带简单模型 ,分析在渐变长度相同、不同渐变方式下导带边的情况 .分析不同掺杂浓度下 ,渐变区长度变化对势垒尖峰值和n区电势能之间差值的影响 .讨论了渐变方式引入高亮度发光二极... 详细信息

引入渐变理论 ,通过建立AlGaInP四元系材料渐变异质结能带简单模型 ,分析在渐变长度相同、不同渐变方式下导带边的情况 .分析不同掺杂浓度下 ,渐变区长度变化对势垒尖峰值和n区电势能之间差值的影响 .讨论了渐变方式引入高亮度发光二极管 (HB LED)

关键词： AlGaInP 镓铝铟磷四元系材料渐变异质结高亮度发光二极管 HB-LED 半导体材料发光效率

离散超混沌Dead-Beat同步加密方法的研究

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计算机工程与应用 2004年第26期40卷 1-3,15页

作者：吴敏丘水生华南师范大学量子电子学研究所广州510631 华南理工大学电信学院广州510640

该文将离散混沌系统Dead-Beat同步方法应用于超混沌广义Henon映射,提出一种离散超混沌同步加密方案。该方案应用超混沌信号以增强载波信号的随机性,并利用了广义Henon映射Dead-Beat同步加密的复杂性。尤其是发送、接收两部分同步的系统... 详细信息

该文将离散混沌系统Dead-Beat同步方法应用于超混沌广义Henon映射,提出一种离散超混沌同步加密方案。该方案应用超混沌信号以增强载波信号的随机性,并利用了广义Henon映射Dead-Beat同步加密的复杂性。尤其是发送、接收两部分同步的系统在硬件实现的情况下可以充分发挥混沌不可预测性的作用。因此,该文方案对于较高安全性加密系统的设计具有参考价值。仿真结果表明:密文加密效果好,恢复图像与原图像差别很小。

关键词：混沌混沌密码学混沌同步超混沌

极化子效应对量子盘中线性和非线性光吸收系数的影响

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物理学报 2002年第9期51卷 2022-2028页

作者：刘翠红陈传誉马本堃北京师范大学物理系和理论物理研究所北京100875 广州大学理学院物理与电子信息系广州510405

利用密度矩阵的方法 ,得出了考虑极化子效应的量子盘的线性和非线性光吸收系数的解析表达式 ,并以GaAs为例讨论了光吸收系数与不同的入射光子能量和量子盘的厚度之间的关系 .结果表明。

关键词：量子盘极化子效应线性光吸收系数量子点非线性光吸收系数半导体非线性光学

Advantages of an InGaN-based light emitting diode with a p-InGaN/p-GaN superlattice hole accumulation layer

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chinese Physics B 2013年第5期22卷 604-608页

作者：刘超任志伟陈鑫赵璧君王幸福尹以安李述体 institute of Opto-electronic Materials and Technology South China Normal University

P-InGaN/p-GaN superlattices （SLs） are developed for a hole accumulation layer （HAL） of a blue light emitting diode （LED）. Free hole concentration as high as 2.6× 1.1. cm-3 is achieved by adjusting the Cp2Mg flow rate during the growth of p-InGaN/p-GaN SLs. The p-InGaN/p-GaN SLs with appropriate Cp2Mg flow rates are then incorporated between the multi-quantum well and A1.aN electron blocking layer as an HAL, which leads to the enhancement of light output power by 29% at 200 mA, compared with the traditional LED without such SL HAL. Meanwhile, the efficiency droop is also effectively alleviated in the LED with the SL HAL. The improved performance is attributed to the increased hole injection efficiency, and the reduced electron leakage by inserting the p-type SL HAL.

关键词： light emitting diodes hole accumulation layer efficiency droop