Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler

Davanço, M., Rakher, M.T., Wegscheider, W., Schuh, D., Badolato, A. and Srinivasan, K. (2011) Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler. Applied Physics Letters, 99(12), 121101. (doi: 10.1063/1.3617472)

Abstract

We demonstrate a spectrally broadband and efficient technique for collecting emission from a single InAs quantum dot directly into a standard single mode optical fiber. In this approach, an optical fiber taper waveguide is placed in contact with a suspended GaAs nanophotonic waveguide with embedded quantum dots, forming a broadband directional coupler with standard optical fiber input and output. Efficient photoluminescence collection over a wavelength range of tens of nanometers is demonstrated, and a maximum collection efficiency of 6% (corresponding single photon rate of 3.0 MHz) into a single mode optical fiber is estimated for a single quantum dot exciton.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Badolato, Professor Antonio
• Authors: Davanço, M., Rakher, M.T., Wegscheider, W., Schuh, D., Badolato, A., and Srinivasan, K.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics Letters
• Publisher: AIP Publishing
• ISSN: 0003-6951
• ISSN (Online): 1077-3118