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Main Title: All-optical depletion of dark excitons from a semiconductor quantum dot
Author(s): Schmidgall, Emma R.
Schwartz, Ido
Cogan, Dan
Gantz, Liron
Heindel, Tobias
Reitzenstein, Stephan
Gershoni, David
Type: Article
Abstract: Semiconductor quantum dots are considered to be the leading venue for fabricating on-demand sources of single photons. However, the generation of long-lived dark excitons imposes significant limits on the efficiency of these sources. We demonstrate a technique that optically pumps the dark exciton population and converts it to a bright exciton population, using intermediate excited biexciton states. We show experimentally that our method considerably reduces the dark exciton population while doubling the triggered bright exciton emission, approaching thereby near-unit fidelity of quantum dot depletion.
Subject(s): quantum dot
Issue Date: 11-May-2015
Date Available: 23-Apr-2020
Language Code: en
DDC Class: 530 Physik
Journal Title: Applied Physics Letters
Publisher: American Institute of Physics (AIP)
Volume: 106
Issue: 19
Article Number: 193101
Publisher DOI: 10.1063/1.4921000
EISSN: 1077-3118
ISSN: 0003-6951
Notes: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 106, 193101 (2015) and may be found at
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Festkörperphysik » AG Optoelektronik und Quantenbauelemente
Appears in Collections:Technische Universität Berlin » Publications

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