Time-domain radiation and absorption by subwavelength sources

被引：2
|
作者：
Bossy, E. [1 ]
Carminati, R. [1 ]
机构：
[1] CNRS, ESPCI ParisTech, Inst Langevin, F-75231 Paris 05, France
来源：
EPL | 2012年 / 97卷 / 03期
关键词：
REVERSAL; DIPOLE; ENERGY; FLOW;
D O I：
10.1209/0295-5075/97/34001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Radiation by elementary sources is a basic problem in wave physics. We show that the time-domain energy flux radiated from electromagnetic and acoustic subwalength sources exhibits remarkable features. In particular, a subtle trade-off between source emission and absorption underlies the mechanism of radiation. This behavior should be observed for any kind of classical waves, thus having broad potential implications. We discuss the implication for subwavelength focusing by time reversal with active sources. Copyright (C) EPLA, 2012
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页数：5
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