%0 Journal Article
%T Second harmonic generation in GaAs photonic crystal cavities in (111)B and (001) crystal orientations
%A Sonia Buckley
%A Marina Radulaski
%A Jan Petykiewicz
%A Konstantinos G. Lagoudakis
%A Ju-Hyung Kang
%A Mark Brongersma
%A Klaus Biermann
%A Jelena Vuckovic
%J Physics
%D 2014
%I arXiv
%R 10.1021/ph500054u
%X We demonstrate second harmonic generation in photonic crystal cavities in (001) and (111)B oriented GaAs. The fundamental resonance is at 1800 nm, leading to second harmonic below the GaAs bandgap. Below-bandgap operation minimizes absorption of the second harmonic and two photon absorption of the pump. Photonic crystal cavities were fabricated in both orientations at various in-plane rotations of the GaAs substrate. The rotation dependence and farfield patterns of the second harmonic match simulation. We observe similar maximum efficiencies of 1.2 %/W in (001) and (111)B oriented GaAs.
%U http://arxiv.org/abs/1402.3739v3