Journal
OPTICS LETTERS
Volume 31, Issue 14, Pages 2169-2171Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.31.002169
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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. (c) 2006 Optical Society of America.
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