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arXiv · 1104.4036

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

M. Davanco·M. T. Rakher·W. Wegscheider·D. Schuh·A. Badolato·K. Srinivasan
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Abstract

We demonstrate a spectrally broadband and effcient technique for collecting photoluminescence 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 an effcient and broadband directional coupler with standard optical fiber input and output. Effcient photoluminescence collection over a wavelength range of tens of nanometers is demonstrated, and a maximum collection effciency of 6.05 % (corresponding single photon rate of 3.0 MHz) into a single mode optical fiber was estimated for a single quantum dot exciton.

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M. Davanco, M. T. Rakher, W. Wegscheider, D. Schuh, A. Badolato, K. Srinivasan. 2011-09-27. Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler. https://doi.org/10.1063/1.3617472

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