Phys. Rev. Lett. 103, 103602 (2009) [4 pages]

Repulsive Casimir Force in Chiral Metamaterials

Abstract

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R. Zhao^1,2, J. Zhou¹, Th. Koschny^1,3, E. N. Economou^3,4, and C. M. Soukoulis^1,3
¹Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
²Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China
³Institute of Electronic Structure and Laser, FORTH, and Department of Materials Science and Technology, University of Crete, 71110 Heraklion, Crete, Greece
⁴Department of Computational and Data Sciences, George Mason University, Fairfax, Virginia 22030, USA

Received 15 May 2009; revised 15 August 2009; published 4 September 2009

We demonstrate theoretically that one can obtain repulsive Casimir forces and stable nanolevitations by using chiral metamaterials. By extending the Lifshitz theory to treat chiral metamaterials, we find that a repulsive force and a minimum of the interaction energy possibly exist for strong chirality, under realistic frequency dependencies and correct limiting values (for zero and infinite frequencies) of the permittivity, permeability, and chiral coefficients.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.103.103602

DOI:

10.1103/PhysRevLett.103.103602

PACS:

42.50.Ct, 12.20.−m, 78.20.Ek

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Phys. Rev. Lett. 103, 103602 (2009) [4 pages]

Repulsive Casimir Force in Chiral Metamaterials

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