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Three-dimensional FDTD simulation of micro-pillar microcavity geometries suitable for efficient single-photon sources

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)462 - 472
Number of pages11
JournalIEEE Journal of Quantum Electronics
Journal issue6
StatePublished - Jun 2007


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

Additional information

Publisher: Insitute of Electrical and Electronics Engineers (IEEE) Rose publication type: Journal article Sponsorship: This work was supported in part by the EPSRC IRC in Quantum Information Processing and by the European Commission under the Integrated Project Qubit Applications. The work of J.G. Rarity was supported by the Royal Society through a Wolfson Merit Award Terms of use: Copyright © 2007 IEEE. Reprinted from IEEE Journal of Quantum Electronics. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • Bragg reflection, cavity quantum electrodynamics, light confinement, optical microcavities, photonic bandgaps, quantum dots, spontaneous emission modification

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