Toward high-efficiency quantum-dot single-photon sources

Jean-Michel Gerard; Bruno Gayral

doi:10.1117/12.543168

14 June 2004 Toward high-efficiency quantum-dot single-photon sources

Jean-Michel Gerard, Bruno Gayral

Proceedings Volume 5361, Quantum Dots, Nanoparticles, and Nanoclusters; (2004) https://doi.org/10.1117/12.543168
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

We discuss the potential applications of single photon sources based on a single quantum dot, emphasizing the crucial importance of the efficiency parameter in view of applications in the field of quantum computing and quantum communications. By inserting the single quantum dot in a pillar microcavity, an efficiency as high as 44% has been obtained by using the Purcell effect. We show that this approach is limited in practice by extrinsic cavity losses, such as those related to the scattering by the sidewalls roughness. We present novel design rules for micropillars in view of this application and show that for the well-mastered GaAs/AlAs system more than 70% of the emission can be concentrated into the collimated emission beam associated with the fundamental cavity mode. We show finally that a novel design, based on a state-of-the-art 2D photonic crystal microcavity, could permit to reach efficiencies in excess of 0.95.

Citation Download Citation

Jean-Michel Gerard and Bruno Gayral "Toward high-efficiency quantum-dot single-photon sources", Proc. SPIE 5361, Quantum Dots, Nanoparticles, and Nanoclusters, (14 June 2004); https://doi.org/10.1117/12.543168

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