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Opt Lett. 2006 Jul 15;31(14):2169-71.

Compensating losses in negative-index metamaterials by optical parametric amplification.

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1
Department of Physics and Astronomy, University of Wisconsin-Stevens Point 54481-3897, USA. apopov@uwsp.edu

Abstract

Optical parametric amplification controlled by the auxiliary electromagnetic field enables transparency, amplification, and oscillation with no cavity in strongly absorbing negative-index metamaterials. The opposite directions of the wave vector and the Poynting vector in such materials result in extraordinary optical properties, including "backward" phase matching and the generation of entangled pairs of left- and right-handed counterpropagating photons.

PMID:
16794715
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