Multiple time scale blinking in InAs quantum dot single-photon sources
Optics
2015-06-16 v2 Mesoscale and Nanoscale Physics
Quantum Physics
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)(\tau) 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)(\tau) 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.
Cite
@article{arxiv.1306.0614,
title = {Multiple time scale blinking in InAs quantum dot single-photon sources},
author = {Marcelo Davanco and C. Stephen Hellberg and Serkan Ates and Antonio Badolato and Kartik Srinivasan},
journal= {arXiv preprint arXiv:1306.0614},
year = {2015}
}