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Applied Physics Letters / Volume 96 / Issue 18 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 96, 181102 (2010); http://dx.doi.org/10.1063/1.3425890 (3 pages)

In search of the elusive lossless metal

J. B. Khurgin1 and G. Sun2

1Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
2Department of Physics, University of Massachusetts Boston, Boston, Massachusetts 02125, USA

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(Received 22 February 2010; accepted 15 April 2010; published online 3 May 2010)

We show that when one looks beyond the Drude model of metal conductivity, the metals that may be extremely lossy for low frequency electromagnetic waves can become perfectly lossless in the mid-IR region or higher, while retaining the essential metallic characteristic of negative permittivity even at those frequencies. We identify that the transition to the lossless regime occurs when the interatomic distances in the lattice exceed certain values, typically a factor of two larger than those occurring in nature. We believe that advances in nanoassembly may render lossless metals feasible with revolutionary implications for the fields of plasmonics and metamaterials.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

electromagnetic waves, metals, metamaterials, nanophotonics, optical conductivity, optical losses, permittivity, plasmonics

PACS

  • 42.70.-a

    Optical materials

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 78.67.Pt

    Multilayers; superlattices; photonic structures; metamaterials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3425890

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    P. Markoš, I. Rousochatzakis, and C. M. Soukoulis, Phys. Rev. E 66, 045601 (2002).

    M. I. Stockman, Phys. Rev. Lett. 98, 177404 (2007).

    J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).

    J. B. Khurgin, Phys. Rev. B 77, 235206 (2008).


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