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.
@article{arxiv.1104.4036,
title = {Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler},
author = {M. Davanco and M. T. Rakher and W. Wegscheider and D. Schuh and A. Badolato and K. Srinivasan},
journal= {arXiv preprint arXiv:1104.4036},
year = {2015}
}