| Effect of Distribution Pattern of Molecular Dipoles on Microscopic Second-Harmonic Generation |
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| 引用本文： | 邓小元 王先菊 刘汉平 庄正飞 郭周义. Effect of Distribution Pattern of Molecular Dipoles on Microscopic Second-Harmonic Generation[J]. 中国物理快报, 2006, 23(3): 629-632 |
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| 作者姓名： | 邓小元 王先菊 刘汉平 庄正飞 郭周义 |
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| 作者单位： | School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510631 |
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| 摘 要： | We set up a model for dealing with the second-harmonic generation （SHG） from molecular dipoles in a line alignment pattern rather than a planar distribution under a microscope. Because of this model, it is possible to perform a flexibly quantitative investigation of SHG from collagen fibres at a molecular level The line alignment pattern induces more significant modifications in both the angular dipole distribution structure A（θ, φ） and the second-harmonic power structure θ（θ, φ）, compared to a planar distribution. Also, the line Mignment angle t has strong effect on A（θ, φ） and θy（θ, φ）, resulting in an irregular SHG angular power distribution. That is to say, it is unnecessary for SHG emission to present two well-defined off-axis lobes. The total SHG power shows two symmetrical peaks at angles of t = 50° and t - 130° while a drop at t = 90°. The weakest SHG signals can be measured at t = 0° and t = 180°.
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| 关 键 词： | 分配模式 分子偶极 第二谐波能量结构 平面分布 SHG |
| 收稿时间： | 2005-09-20 |
| 修稿时间： | 2005-09-20 |
Effect of Distribution Pattern of Molecular Dipoles on Microscopic Second-Harmonic Generation |
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| DENG Xiao-Yuan, WANG Xian-Ju, LIU Han-Ping, ZHUANG Zheng-Fei, GUO Zhou-Yi. Effect of Distribution Pattern of Molecular Dipoles on Microscopic Second-Harmonic Generation[J]. Chinese Physics Letters, 2006, 23(3): 629-632 |
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| Authors: | DENG Xiao-Yuan WANG Xian-Ju LIU Han-Ping ZHUANG Zheng-Fei GUO Zhou-Yi |
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