Nanofiber-based high-Q microresonator for cryogenic applications

Abstract

We demonstrate a cryo-compatible, fully fiber-integrated, alignment-free optical microresonator. The compatibility with low temperatures expands its possible applications to the wide field of solid-state quantum optics, where a cryogenic environment is often a requirement. At a temperature of 4.6 K we obtain a quality factor of (9.9 ± 0.7) × 106. In conjunction with the small mode volume provided by the nanofiber, this cavity can be either used in the coherent dynamics or the fast cavity regime, where it can provide a Purcell factor of up to 15. Our resonator is therefore suitable for significantly enhancing the coupling between light and a large variety of different quantum emitters and due to its proven performance over a wide temperature range, also lends itself for the implementation of quantum hybrid systems. © 2020 OSA - The Optical Society. All rights reserved.

Description
Keywords
Cryogenics, Hybrid systems, Quantum optics, Resonators, Coherent dynamics, Cryogenic applications, Cryogenic environment, Low temperatures, Micro resonators, Quality factors, Quantum emitters, Wide temperature ranges, Nanofibers
Citation
Hütner, J., Hoinkes, T., Becker, M., Rothhardt, M., Rauschenbeute, A., & Skoff, S. M. (2020). Nanofiber-based high-Q microresonator for cryogenic applications. 28(3). https://doi.org//10.1364/OE.381286
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License
CC BY 4.0 Unported