Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source
Abstract
Deterministic GHz-rate single photon sources at room-temperature would be essential components for various quantum applications. However, both the slow intrinsic decay rate and the omnidirectional emission of typical quantum emitters are two obstacles towards achieving such a goal which are hard to overcome simultaneously. Here we solve this challenge by a hybrid approach, using a complex monolithic photonic resonator constructed of a gold nanocone responsible for the rate enhancement, and a circular Bragg antenna for emission directionality. A repeatable process accurately binds quantum dots to the tip of the antenna-embedded nanocone. As a result we achieve simultaneous 20-fold emission rate enhancement and record-high directionality leading to an increase in the observed brightness by a factor as large as 580 (120) into an NA = 0.22 (0.5). We project that such miniaturized on-chip devices can reach photon rates approaching 2.3*10^8 single photons/second thus enabling ultra-fast light-matter interfaces for quantum technologies at ambient conditions.
Cite
@article{arxiv.2010.15016,
title = {Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source},
author = {Hamza Abudayyeh and Annika Brauer and Dror Liran and Boaz Lubotzky and Lars Luder and Monika Fleischer and Ronen Rapaport},
journal= {arXiv preprint arXiv:2010.15016},
year = {2021}
}