Journal
OPTICS EXPRESS
Volume 22, Issue 6, Pages 6381-6390Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.006381
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Funding
- DARPA SBIR project [W31P4Q-11-C-0109]
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We study second harmonic generation in a 2-D photonic crystal with the pump field tuned at the Dirac point of the structure. The simultaneous generation of both forward and backward phase-matched second harmonic is achieved by exploiting a peculiar regime in which the interacting waves have zero phase velocity in the lattice. This regime can be attained even when strong material dispersion is present and therefore lends itself well to be implemented in semiconductor-based frequency conversion devices. A comparison between this method and the quasi-phase-matching technique is also presented. (C) 2014 Optical Society of America
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