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Ginés L, Pepe C, Gonzales J, et al. Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity. Opt Express. 2021;29(3):4174-4180doi: 10.1364/OE.411021.
Ginés, L., Pepe, C., Gonzales, J., Gregersen, N., Höfling, S., Schneider, C., & Predojević, A. (2021). Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity. Optics express, 29(3), 4174-4180. https://doi.org/10.1364/OE.411021
Ginés, Laia, et al. "Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity." Optics express vol. 29,3 (2021): 4174-4180. doi: https://doi.org/10.1364/OE.411021
Ginés L, Pepe C, Gonzales J, Gregersen N, Höfling S, Schneider C, Predojević A. Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity. Opt Express. 2021 Feb 01;29(3):4174-4180. doi: 10.1364/OE.411021. PMID: 33771002.
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Opt Express. 2021 Feb 01;29(3):4174-4180. doi: 10.1364/OE.411021.

Time-bin entangled photon pairs from quantum dots embedded in a self-aligned cavity.

Optics express

Laia Ginés, Carlo Pepe, Junior Gonzales, Niels Gregersen, Sven Höfling, Christian Schneider, Ana Predojević

PMID: 33771002 DOI: 10.1364/OE.411021

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. 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 for this application. 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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