Improving the performance of bright quantum dot single photon sources using temporal filtering via amplitude modulation

Ates, S., Agha, I., Gulinatii, A., Rech, I., Badolato, A. and Srinivasan, K. (2013) Improving the performance of bright quantum dot single photon sources using temporal filtering via amplitude modulation. Scientific Reports, 3, 1397. (doi: 10.1038/srep01397) (PMID:23466520) (PMCID:PMC3590556)

Abstract

Single epitaxially-grown semiconductor quantum dots have great potential as single photon sources for photonic quantum technologies, though in practice devices often exhibit nonideal behavior. Here, we demonstrate that amplitude modulation can improve the performance of quantum-dot-based sources. Starting with a bright source consisting of a single quantum dot in a fiber-coupled microdisk cavity, we use synchronized amplitude modulation to temporally filter the emitted light. We observe that the single photon purity, temporal overlap between successive emission events and indistinguishability can be greatly improved with this technique. As this method can be applied to any triggered single photon source, independent of geometry and after device fabrication, it is a flexible approach to improve the performance of systems based on single solid-state quantum emitters, which often suffer from excess dephasing and multi-photon background emission.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Badolato, Professor Antonio
• Authors: Ates, S., Agha, I., Gulinatii, A., Rech, I., Badolato, A., and Srinivasan, K.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Scientific Reports
• Publisher: Nature Publishing Group
• ISSN: 2045-2322
• ISSN (Online): 2045-2322
• Copyright Holders: Copyright © 2013 The Authors
• First Published: First published in Scientific Reports 3: 1397
• Publisher Policy: Reproduced under a Creative Commons License