Negative group velocity and three-wave mixing in dielectric crystals

Details Negative group velocity and three-wave mixing in dielectric crystals Negative group velocity and three-wave mixing in dielectric crystals

2011-04-05

arxiv.org/abs/1104.0891v1

Optics Letters, Vol. 36, Issue 19, pp. 3861-3863 (2011)

Physics

Optics

8 pages, 2 figures

Scientific paper

10.1364/OL.36.003861

Extraordinary features of optical parametric amplification of Stokes electromagnetic waves are investigated, which originate from three-wave mixing of two ordinary electromagnetic and one backward phonon wave with negative group velocity. A similarity with the counterpart in the negative-index plasmonic metamaterials and differences with those utilizing contra-propagating ordinary electromagnetic waves as well as electromagnetic and acoustic phonon waves are shown. They stem from backwardness of optical phonons with negative dispersion. Nonlinear-optical photonic devices with the properties similar to those predicted for the negative-index metamaterials are proposed.

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