Related papers: Coherent and Purcell-enhanced emission from erbium dopants in a cryogenic high-Q resonator

Coherent and Purcell-enhanced emission from erbium dopants in a cryogenic high-Q resonator

URL: http://arxiv.org/abs/2006.14229v2
Date: Tue, 10 Nov 2020 18:53:10 GMT
Title: Coherent and Purcell-enhanced emission from erbium dopants in a cryogenic high-Q resonator
Authors: Benjamin Merkel, Alexander Ulanowski, Andreas Reiserer
Abstract summary: A 19 micrometer thin erbium-doped crystal is integrated into a cryogenic Fabry-Perot resonator with a quality factor of nine million. Our system enables coherent and efficient nodes for long-distance quantum networks.
Score: 68.8204255655161
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The stability and outstanding coherence of dopants and other atom-like defects in tailored host crystals make them a leading platform for the implementation of distributed quantum information processing and sensing in quantum networks. Albeit the required efficient light-matter coupling can be achieved via the integration into nanoscale resonators, in this approach the proximity of interfaces is detrimental to the coherence of even the least-sensitive emitters. Here, we establish an alternative: By integrating a 19 micrometer thin erbium-doped crystal into a cryogenic Fabry-Perot resonator with a quality factor of nine million, we can demonstrate 59(6)-fold enhancement of the emission rate, corresponding to a two-level Purcell factor of 530(50), while preserving lifetime-limited optical coherence up to 0.54(1) ms. With its emission at the minimal-loss wavelength of optical fibers and its outcoupling efficiency of 46(8) %, our system enables coherent and efficient nodes for long-distance quantum networks.

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