Hütner, J., Hoinkes, T., Becker, M., Rothhardt, M., Rauschenbeutel, A., & Skoff, S. M. (2020). Nanofiber-based high-Q microresonator for cryogenic applications. Optics Express, 28(3), 3249–3257. https://doi.org/10.1364/OE.381286
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.
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Project title:
Single Molecules on Optical Nanofibres: M2114-N27 (FWF - Österr. Wissenschaftsfonds) Error-Proof Optical Bell-State Analyzer: 800942 (European Commission)
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Research Areas:
Photonics: 90% Design and Engineering of Quantum Systems: 10%
