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Below bandgap second harmonic generation in GaAs photonic crystal cavites in (111) and (001) crystal orientations

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Abstract

We demonstrate second harmonic generation in photonic crystal cavities in (001)- and (111)-oriented GaAs, with fundamental resonance at 1800nm, leading to second harmonic below the GaAs bandgap. Below bandgap operation minimizes linear and nonlinear absorption.

© 2014 Optical Society of America

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