INTENSITY STATISTICS AND CORRELATION IN ABSORBING RANDOM-MEDIA

被引：28

作者：

GENACK, AZ

GARCIA, N

机构：

[1] Department of Physics, Queens College of the City University of New York, Flushing, NY

来源：

EUROPHYSICS LETTERS | 1993年 / 21卷 / 07期

关键词：

PROPAGATION AND TRANSMISSION IN INHOMOGENEOUS MEDIA; COHERENCE; SCINTILLATION; FLUCTUATION PHENOMENA; RANDOM PROCESSES; AND BROWNIAN MOTION;

D O I：

10.1209/0295-5075/21/7/007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the distribution of normalized intensity of a single polarization component of microwave radiation transmitted through absorbing random dielectric samples contained in a copper tube are fit by an expression derived by Shnerb and Kaveh in the weak-correlation limit for non-dissipative systems. We show that the single parameter in the theory is one-half the degree of long-range correlation which is the inverse of the dimensionless conductance. The equivalence of these parameters and their weak dependence upon absorption suggests that the proximity to the localization threshold is nearly independent of absorption for extended waves. Systematic departures of calculated moments from the measured values indicate the contribution of higher-order corrections to the intensity distribution.

引用

页码：753 / 758

页数：6