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Modelling and Fabrication of GaAs Photonic-Crystal Cavities for Cavity Quantum Electrodynamics

Research Area: Nanophotonics Year: 2010
Type of Publication: Article Keywords: photonic crystals, cavity quantum electrodynamics, cQED, quantum dots, quantum well, photonic bandgap
Authors: Khankhoje, Uday; Kim, Se-Heon; Richards, B. C.; Hendrickson, J.; Sweet, J.; Olitzky, J. D.; Khitrova, G.; Gibbs, H. M.; Scherer, Axel
Journal: Nanotechnology Volume: 21
Number: 6 Pages: 065202
Month: February
Abstract:
In this paper, we present recent progress in the growth, modelling, fabrication and characterization of gallium arsenide (GaAs) two-dimensional (2D) photonic-crystal slab cavities with embedded indium arsenide (InAs) quantum dots (QDs) that are designed for cavity quantum electrodynamics (cQED) experiments. Photonic-crystal modelling and device fabrication are discussed, followed by a detailed discussion of different failure modes that lead to photon loss. It is found that, along with errors introduced during fabrication, other significant factors such as the presence of a bottom substrate and cavity axis orientation with respect to the crystal axis, can influence the cavity quality factor (Q). A useful diagnostic tool in the form of contour finite-difference time domain (FDTD) is employed to analyse device performance.
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