Expressions of stored and dissipated energy densities

被引：10

作者：

Chen, Jiangwei ^{[1
]}

Yu Xuanyuan ^{[1
]}

Dai, Yuyao ^{[1
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210003, Peoples R China

来源：

OPTIK | 2020年 / 207卷

关键词：

Stored and dissipated energy; Poynting's theorem; Criterion; Electromagnetic wave; METAMATERIAL;

D O I：

10.1016/j.ijleo.2019.163493

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

There exist several unequivalent expressions of stored and dissipated energy densities. It is still lack of correctness judgement for these expressions. Here, we shall propose that the time-averaged form of Poynting's theorem, which implies that the net power flowing into a closed surface equals the power dissipated in the enclosed volume, may be taken as a correctness criterion for expression of dissipated energy density. Then we review the common expressions of stored and dissipated energy densities and provide possibility to derive equivalent expressions by using different ways. This work may be helpful to gain a better understanding of storage and dissipation of energy in the electromagnetic wave.

引用

页数：7

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