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Title:
Multiple time scale blinking in InAs quantum dot single-photon sources
Authors:
Davanço, Marcelo; Hellberg, C. Stephen; Ates, Serkan; Badolato, Antonio; Srinivasan, Kartik
Affiliation:
AA(Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA; Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, USA), AB(Center for Computational Materials Science, Code 6390, Naval Research Laboratory, Washington, DC 20375, USA), AC(Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA; Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, USA), AD(Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA), AE(Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA)
Publication:
Physical Review B, Volume 89, Issue 16, id.161303 (PhRvB Homepage)
Publication Date:
04/2014
Origin:
APS
PACS Keywords:
Quantum dots, III-V semiconductors, Quantum dots, Quantum well devices
Abstract Copyright:
2014: American Physical Society
DOI:
10.1103/PhysRevB.89.161303
Bibliographic Code:
2014PhRvB..89p1303D

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 11 orders of magnitude in time, and shows signatures of blinking over time scales ranging from tens of nanoseconds to tens of milliseconds. The g(2)(tau) data is fit to a multilevel system rate equation model that includes multiple nonradiating (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.
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