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Three-Dimensional FDTD Simulation of Micro-Pillar Microcavity Geometries Suitable for Efficient Single-Photon Sources

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7 Author(s)
Ho, Y.-L.D. ; Dept. of Electr. & Electron. Eng., Bristol Univ. ; Tun Cao ; Ivanov, P.S. ; Cryan, M.J.
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We present the results of calculations of the microcavity mode structure of distributed-Bragg-reflector (DBR) micro-pillar microcavities of group III-V semiconductor materials. These structures are suitable for making single photon sources when a single quantum dot is located at the center of a wavelength scale cavity. The 3-D finite difference time domain (FDTD) method is our primary simulation tool and results are validated against semi-analytic models. We show that high light extraction efficiencies can be achieved (>90%) limited by sidewall scattering and leakage. Using radial trench DBR microcavities or 2-D photonic crystal structures, we can further suppress sidewall emission, however, light is then redirected into other leaky modes

Published in:

Quantum Electronics, IEEE Journal of  (Volume:43 ,  Issue: 6 )

Date of Publication:

June 2007

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