• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Monte-Carlo Simulation of Polarization-Selective Spectral Hole Burning in Fractal Clusters.
【24h】

Monte-Carlo Simulation of Polarization-Selective Spectral Hole Burning in Fractal Clusters.

机译：分形团簇中偏振选择性光谱孔燃烧的monte-Carlo模拟。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fractals, objects of noninteger dimensionality embedded into usual (three dimensional) space, possess many nontrivial mathematical properties. There exists a series of physical systems whose geometry can be adequately described as fractal. We shall restrict ourselves to the study of one of such physical realizations of fractals, namely fractal clusters, (simply called below as fractals). More specifically, we shall consider theoretically the selective photomodification of fractals induced by powerful laser radiation. Experimentally, this phenomenon has recently been observed in silver clusters in colloidal solutions and gels. The effect of selective photomodification consists in burning out the spectral hole in the absorption contour of a fractal at the frequency close to that of the exciting laser radiation. The spectral hole exists at times on the order of months or longer and, thus, can be considered as persistent. The primary hole is highly dichroic: it is observed only in the polarization of the probe light coinciding with that of the exciting radiation and is practically absent for the normal polarizations. In solutions this dichroism relaxes with the rotational diffusion times of the clusters, and in gels it does not significantly change for months. The experimental data indicate that the photomodification has a threshold in the intensity of the laser radiation. Below we shall exploit the last feature to develop the theory of the photomodification which should explain its selectivity and give further predictions to stimulate experimental study. (kr)

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号