Multiple time scale blinking in InAs quantum dot single-photon sources

Abstract

We use photon correlation measurements to study blinking in single, epitaxially-grown self-assembled InAs quantum dots situated in circular Bragg grating and microdisk cavities. The normalized second-order correlation function g(2)(τ) is studied across eleven orders of magnitude in time, and shows signatures of blinking over timescales ranging from tens of nanoseconds to tens of milliseconds. The g(2)(τ) data is fit to a multi-level system rate equation model that includes multiple non-radiating (dark) states, from which radiative quantum yields significantly less than 1 are obtained. This behavior is observed even in situations for which a direct histogramming analysis of the emission time-trace data produces inconclusive results.

References in corpus (4)

• Photonic quantum technologies
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• Coulomb interactions in single, charged self-assembled quantum dots: radiative lifetime and recombination energy
• Improving the performance of bright quantum dot single photon sources using amplitude modulation

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