Causality in the propagation of transient electromagnetic waves in a left-handed medium

被引：10

作者：

Cui, TJ ^{[1
]}

Kong, JA

机构：

[1] Southeast Univ, Ctr Computat Electromagnet, Nanjing 210096, Peoples R China

[2] Southeast Univ, State Key Lab Millimeter Waves, Dept Radio Engn, Nanjing 210096, Peoples R China

[3] Zhejiang Univ Yu Quan, Electromagnet Acad, Hangzhou 310027, Peoples R China

[4] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 16期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevB.70.165113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Since the concept of left-handed medium (LHM) was proposed, the causality has been a big concern in the understanding of LHM. Through an exact analysis of a 1D transient current source radiating in a LHM, the causality in the propagation of electromagnetic waves is investigated where three cases are considered for different frequency dispersions in LHM. Numerical experiments have shown that the causality would be violated if the LHM were homogeneous and frequency nondispersive in the whole frequency range or in a certain frequency band. However, such a nondispersive LHM does not exist. For a realistic artificial LHM which is frequency dispersive [Science 292, 77 (2001)], we have shown that the causality is not violated at all.

引用

页码：1 / 6

页数：6

共 16 条

[1] Study of lossy effects on the propagation of propagating and evanescent waves in left-handed materials [J].

Cui, TJ ;

Hao, ZC ;

Yin, XX ;

Hong, W ;

Kong, JA .

PHYSICS LETTERS A, 2004, 323 (5-6) :484-494

[2] Effects of surface waves on the behavior of perfect lenses [J].

Feise, MW ;

Bevelacqua, PJ ;

Schneider, JB .

PHYSICAL REVIEW B, 2002, 66 (03) :351131-351135

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

Garcia, N ;

Nieto-Vesperinas, M .

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

[4]

Kong J.A., 2002, Prog. Electromagn. Res, V35, P1

[5] Lateral displacement of a Gaussian beam reflected from a grounded slab with negative permittivity and permeability [J].

Kong, JA ;

Wu, BI ;

Zhang, Y .

APPLIED PHYSICS LETTERS, 2002, 80 (12) :2084-2086

[6] Power propagation in homogeneous isotropic frequency-dispersive left-handed media [J].

Pacheco, J ;

Grzegorczyk, TM ;

Wu, BI ;

Zhang, Y ;

Kong, JA .

PHYSICAL REVIEW LETTERS, 2002, 89 (25) :1-257401

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

Pendry, JB .

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

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

Rao, XS ;

Ong, CK .

PHYSICAL REVIEW B, 2003, 68 (11)

[9] Experimental verification of a negative index of refraction [J].

Shelby, RA ;

Smith, DR ;

Schultz, S .

SCIENCE, 2001, 292 (5514) :77-79

[10] Limitations on subdiffraction imaging with a negative refractive index slab [J].

Smith, DR ;

Schurig, D ;

Rosenbluth, M ;

Schultz, S ;

Ramakrishna, SA ;

Pendry, JB .

APPLIED PHYSICS LETTERS, 2003, 82 (10) :1506-1508

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