The Kullback-Leibler Divergence evolution of randomized electromagnetic field

被引：1

作者：

Shi, Tian ^{[1
,2
]}

Li, Yunzhou ^{[3
]}

Shi, Qingfan ^{[1
]}

Li, Liangsheng ^{[2
]}

Zheng, Ning ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China

[2] Sci & Technol Electromagnet Scattering Lab, Beijing 100854, Peoples R China

[3] Kunming Shipbldg Equipment Res & Test Ctr, Kunming 650051, Yunnan, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2021年 / 478卷

基金：

中国国家自然科学基金;

关键词：

Statistical optics; Kullback-Leibler Divergence; Random media; Randomized electromagnetic field; SCATTERING; DISTRIBUTIONS;

D O I：

10.1016/j.optcom.2020.126411

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The statistical properties of randomized electromagnetic field have been investigated by simulating the scattering of electromagnetic waves by random media (RMs). In the viewpoint of a theoretical requirement, the probability density function of perfectly randomized field satisfies the zero-mean circular Gaussian (ZMCG) statistics. We find that Kullback-Leibler Divergence (KLD) can quantitatively evaluate the randomness of an electromagnetic field to improve the design of RMs. There are two types of RMs which can efficiently randomize the electromagnetic waves only by monotonically increasing the permittivity of scatterers. When both the permittivity and total number of scatterers are fixed, KLD always have a limitation in any practical RM, which are characterized by a plateau on the evolutionary curve.

引用

页数：6

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