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Anderson localization of light

安德森光定位

基本信息

批准号：
62460034
负责人：
HIKAMI Shinobu
金额：
$ 4.42万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460034/
关键词：
Anderson localization Speckle 後方散乱光光散乱

项目摘要

Anderson localization is investigated for light scattering in random medium. The latex scatters the laser beam of He-Ne and the enhancement of back scattering intensity has been observed. This is due to time reversed light path. The enhancement of the back scattering light becomes almost twice compared to the background intensity. This effect is similar to the electron Anderson localization. As same as the magnetoresistance of electron, the light intensity of back scattering is affected by the broken time reversal terms. We have investigated the effect of the polarization and found that the maximum enhancement is realized in the case of parrallel polarizer introduced and minimum for transvers case. We also have found that the fluctuation in the enhanced peak region of the intensity of back scattering light. This fluctuation is large compared to the outside region of the peak. This fluctuation is related to the speckle of the large size and it shows that the large coherent region in the bvack scattering peak. We analized the fourier components of this fluctuation and investigated the statistical distributuion of the intensity of back scattering light. The Anderson localization of light is shown to be closely related to the particular distribution of the intensity of back scattering litht. We also made analysis of the solid random scatterer TiO_2 and compared to the liquid latex scatterer and investigated the fluctuation of the intensity.

研究了随机介质中光散射的安德森局域化。乳胶对He-Ne激光束的散射增强。这是由于光路发生了时间反转，后向散射光的增强几乎是背景光的两倍。这种效应类似于电子安德森局域化。与电子的磁电阻效应一样，后向散射光强也受到时间反转项破缺的影响。我们研究了偏振的影响，发现在平行偏振器的情况下实现了最大的增强，而在横向情况下实现了最小的增强。我们还发现后向散射光强度在增强峰区的起伏。与峰的外部区域相比，该波动较大。这种起伏与大尺寸的散斑有关，它表明在Bvack散射峰中存在较大的相干区。我们分析了这种涨落的傅立叶分量，并研究了后向散射光强度的统计分布。光的安德森局域化与后向散射光强度的特定分布密切相关。对固体无规散射体TiO_2进行了分析，并与液体乳胶散射体进行了比较，研究了其强度起伏。