Evanescent field on the surface of a negative-index planar lens

被引：33

作者：

Liu, Cheng ^{[1
]}

Yan, Changchun

Chen, Hao

Liu, Ying

Gao, Shumei

机构：

[1] Xuzhou Normal Univ, Dept Phys, Xuzhou 221116, Jiangsu Prov, Peoples R China

[2] So Yangtze Univ, Sch Sci, Jiangsu 214036, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 23期

关键词：

D O I：

10.1063/1.2209885

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The propagation of the evanescent waves in an imaging system formed by left-handed material (LHM) slab is studied with finite difference time domain method. It was found that four energy-stream loops were-formed on the slab interfaces, and the evanescent waves circulated within these loops instead of propagating away along the interfaces, accordingly, they could sustain for remarkably long time after the light source was turned off. Thus, for lossless LHM slab under continuing illumination, the energy of evanescent waves on its interfaces would accumulate with the time, leading to the evanescent wave amplification. This result reveals the back physics of the evanescent wave resonance and amplification, which were used to explain the superimaging with LHM slab, and has the potential to explain some of the contradictories existing in related researches. (c) 2006 American Institute of Physics.

引用

页数：3

共 12 条

[1] Finite-size effects of a left-handed material slab on the image quality [J].

Chen, L ;

He, SL ;

Shen, LF .

PHYSICAL REVIEW LETTERS, 2004, 92 (10) :107404-1

[2] Simulated causal subwavelength focusing by a negative refractive index slab [J].

Cummer, SA .

APPLIED PHYSICS LETTERS, 2003, 82 (10) :1503-1505

[3] Left-handed materials do not make a perfect lens [J].

Garcia, N ;

Nieto-Vesperinas, M .

PHYSICAL REVIEW LETTERS, 2002, 88 (20) :4

[4] Electromagnetic waves focused by a negative-index planar lens [J].

Loschialpo, PF ;

Smith, DL ;

Forester, DW ;

Rachford, FJ ;

Schelleng, J .

PHYSICAL REVIEW E, 2003, 67 (02) :4

[5]

LOSCHIALPO PF, 2004, PHYS REV E, V70

[6] Negative refraction makes a perfect lens [J].

Pendry, JB .

PHYSICAL REVIEW LETTERS, 2000, 85 (18) :3966-3969

[7] Subwavelength imaging by a left-handed material superlens [J].

Rao, XS ;

Ong, CK .

PHYSICAL REVIEW E, 2003, 68 (06)

[8] Amplification of evanescent waves in a lossy left-handed material slab [J].

Rao, XS ;

Ong, CK .

PHYSICAL REVIEW B, 2003, 68 (11)

[9]

Taflove A., 1995, COMPUTATIONAL ELECTR

[10] Wave refraction in negative-index media: Always positive and very inhomogeneous [J].

Valanju, PM ;

Walser, RM ;

Valanju, AP .

PHYSICAL REVIEW LETTERS, 2002, 88 (18) :4

← 1 2 →