Entangled photon pairs from quantum dots embedded in a self-aligned cavity

• URL: http://arxiv.org/abs/2010.01555v2
• Date: Sun, 18 Oct 2020 14:29:25 GMT
• Title: Entangled photon pairs from quantum dots embedded in a self-aligned cavity
• Authors: Laia Gin\'es and Carlo Pepe and Junior Gonzales and Niels Gregersen and Sven H\"ofling and Christian Schneider and Ana Predojevi\'c
• Abstract summary: We introduce a scalable photonic platform that enables efficient generation of entangled photon pairs from a semiconductor quantum dot. We experimentally show collection efficiency of 0.17 combined with a Purcell enhancement of up to 1.7 in the pair emission process.
• Score: 0.2493740042317776
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce a scalable photonic platform that enables efficient generation of entangled photon pairs from a semiconductor quantum dot. Our system, which is based on a self-aligned quantum dot-micro-cavity structure, erases the need for complex steps of lithography and nanofabrication. We experimentally show collection efficiency of 0.17 combined with a Purcell enhancement of up to 1.7 in the pair emission process. We harness the potential of our device to generate photon pairs entangled in time bin, reaching a fidelity of 0.84(5) with the maximally entangled state. The achieved pair collection efficiency is 4 times larger than the state-of-the art. The device, which theoretically supports pair extraction efficiencies of nearly 0.5 is a promising candidate for the implementation of bright sources of time-bin, polarization- and hyper entangled photon pairs in a straightforward manner.

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