The ability to generate mode-engineered single photons to interface with disparate quantum systems is of importance for building a quantum network. Here we report on the generation of a pulsed, heralded single photon source with a sub-GHz spectral bandwidth that couples to indium arsenide quantum dots centered at 942 nm. The source is built with a type-II PPKTP down-conversion crystal embedded in a semi-confocal optical cavity and pumped with a 76 MHz repetition rate pulsed laser to emit collinear, polarization-correlated photon pairs resonant with a single quantum dot. In order to demonstrate direct coupling, we use the mode-engineered cavity-SPDC single-photon source to resonantly excite an isolated single quantum dot.
@article{arxiv.1812.07165,
title = {Direct Excitation of a Single Quantum Dot with Cavity-SPDC Photons},
author = {Uttam Paudel and Jia Jun Wong and Michael Goggin and Paul Kwiat and Allan S. Bracker and Michael Yakes and Daniel Gammon and Duncan Steel},
journal= {arXiv preprint arXiv:1812.07165},
year = {2019}
}