@inproceedings{7cd940fb32a3408fb7b61744c31aaac4,
title = "Progress toward high-efficiency single-photon-level interactions in crystalline microcavities",
abstract = " Low-loss nano- and micro-photonic platforms provide strong optical confinement and as a result enhance the effective material nonlinearity by several orders of magnitude, making them appealing candidates for quantum nonlinear photonics. One such platform is based on high-Q crystalline whispering-gallery-mode (WGM) microresonators, which can provide for highly efficient three-wave mixing, where even a single photon has a strong effect. We present experimental progress on the fabrication of small microresonators (R≲100 μm) with Q-factors ≥ 10 6 that are capable of supporting such strong coupling. We also demonstrate direct imaging of the spatial profiles of the WGMs, which is useful for identifying the phase-matched resonances of three-wave-mixing processes. Additionally, we present theoretical modeling of the cavity dynamics which suggests that single-photon-driven nonlinear processes are feasible in these crystalline microresonators. This crystalline WGM microresonator platform, therefore, can enable deterministic generation of non-classical light, including entangling gates for quantum information processing. ",
keywords = "Nonlinear optics, crystalline microresonators, entangled photons, quantum gates, quantum information processing, quantum optics, quantum photonics, single photons, whispering-gallery modes",
author = "Kowligy, {Abijith S.} and Kanter, {Gregory S.} and Prem Kumar",
note = "Funding Information: We acknowledge funding from the DARPA Quiness Program, Grant No. W31P4Q-13-1-0004. The authors would like to thank Yu-Ping Huang, Yu-Zhu Sun, and Dmitry Strekalov for useful discussions. Funding Information: We acknowledge funding from the DARPA Quiness Program, Grant No. W31P4Q-13-1-0004. like to thank Yu-Ping Huang, Yu-Zhu Sun, and Dmitry Strekalov for useful discussions. Publisher Copyright: {\textcopyright} 2018 SPIE.; Quantum Communications and Quantum Imaging XVI 2018 ; Conference date: 19-08-2018 Through 20-08-2018",
year = "2018",
doi = "10.1117/12.2317833",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Meyers, {Ronald E.} and Yanhua Shih and Deacon, {Keith S.}",
booktitle = "Quantum Communications and Quantum Imaging XVI",
}