Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source

• URL: http://arxiv.org/abs/2010.15016v2
• Date: Tue, 3 Nov 2020 07:44:54 GMT
• Title: Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source
• Authors: Hamza Abudayyeh, Annika Brauer, Dror Liran, Boaz Lubotzky, Lars Luder, Monika Fleischer, Ronen Rapaport
• Abstract summary: GHz-rate single photon sources at room-temperature would be essential components for various quantum applications. Slow intrinsic decay rate and the omnidirectional emission of typical quantum emitters are two obstacles towards achieving such a goal. We project that such miniaturized on-chip devices can reach photon rates approaching 2.3*108 single photons/second.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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