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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 21, Iss. 12 — Dec. 1, 2004
  • pp: 2311–2319

Scattering properties of an impedance-matched, ideal, homogeneous, causal “left-handed” sphere

Cesar Monzon, Donald W. Forester, and Louis N. Medgyesi-Mitschang  »View Author Affiliations


JOSA A, Vol. 21, Issue 12, pp. 2311-2319 (2004)
http://dx.doi.org/10.1364/JOSAA.21.002311


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Abstract

The plane-wave scattering properties of a sphere of material having an ideal, homogeneous, and causal permittivity ε(f), and permeability μ(f) were investigated through detailed three-dimensional finite-difference time-domain, method-of-moments, and series-solution simulations. A Lorentzian functional form was chosen for ε(f) and μ(f), as it yields causal responses and allows us to study the physics of the left-handed-medium (LHM) regime. Our interest lies mainly in the frequency range where negative refraction [Re(n)<0] is observed. We found that when operating in the LHM regime, an impedance-matched sphere responds with scattering features strikingly different from those found in ordinary materials. In particular, we found zero backscattering and forward scattering that exceeds that of a metal sphere of similar size. The equality of E- and H-plane patterns was proved analytically and numerically, and the possibility of internal subwavelength focusing with a zero index sphere is also reported.

© 2004 Optical Society of America

OCIS Codes
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics
(290.0290) Scattering : Scattering
(290.1350) Scattering : Backscattering
(290.4020) Scattering : Mie theory

History
Original Manuscript: February 3, 2004
Revised Manuscript: June 3, 2003
Manuscript Accepted: June 3, 2003
Published: December 1, 2004

Citation
Cesar Monzon, Donald W. Forester, and Louis N. Medgyesi-Mitschang, "Scattering properties of an impedance-matched, ideal, homogeneous, causal “left-handed” sphere," J. Opt. Soc. Am. A 21, 2311-2319 (2004)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-21-12-2311

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