RESONANT LIGHT-SCATTERING BY FRACTAL CLUSTERS

被引:55
作者
SHALAEV, VM
BOTET, R
JULLIEN, R
机构
[1] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY
[2] LV KIRENSKY PHYS INST,KRASNOYARSK,USSR
[3] UNIV PARIS 11,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 22期
关键词
D O I
10.1103/PhysRevB.44.12216
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A scale-invariant theory of resonant Rayleigh scattering by fractal clusters is developed. Our main result is that the scattering cross section is greatly enhanced, because of the presence of very high local fields, which are correlated and strongly fluctuating. Simulations dealing with two examples of fractal structures, namely, random walk and cluster-cluster aggregates, are presented. The numerical results confirm the theoretical predictions of the scaling behavior for both absorption and scattering, and allow us to obtain the corresponding exponents. In addition to the results for scattering, the large scale of the simulations of the present work provides a comprehensive confirmation and a substantial extension of a recent study by Markel, Muratov, Stockman, and George [Phys. Rev. B 43, 8183 (1991)].
引用
收藏
页码:12216 / 12225
页数:10
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