A Low-Temperature Tunable Microcavity featuring High Passive Stability and Microwave Integration
Abstract
Open microcavities offer great potential for the exploration and utilization of efficient spin-photon interfaces with Purcell-enhanced quantum emitters thanks to their large spectral and spatial tunability combined with high versatility of sample integration. However, a major challenge for this platform is the sensitivity to cavity length fluctuations in the cryogenic environment, which leads to cavity resonance frequency variations and thereby a lowered averaged Purcell enhancement. This work presents a closed-cycle cryogenic fiber-based microcavity setup, which is in particular designed for a low passive vibration level, while still providing large tunability and flexibility in fiber and sample integration, and high photon collection efficiency from the cavity mode. At temperatures below 10 Kelvin, a stability level of around 25 picometer is reproducibly achieved in different setup configurations, including the extension with microwave control for manipulating the spin of cavity-coupled quantum emitters, enabling a bright photonic interface with optically active qubits.
Cite
@article{arxiv.2409.01857,
title = {A Low-Temperature Tunable Microcavity featuring High Passive Stability and Microwave Integration},
author = {Yanik Herrmann and Julius Fischer and Stijn Scheijen and Cornelis F. J. Wolfs and Julia M. Brevoord and Colin Sauerzapf and Leonardo G. C. Wienhoven and Laurens J. Feije and Martin Eschen and Maximilian Ruf and Matthew J. Weaver and Ronald Hanson},
journal= {arXiv preprint arXiv:2409.01857},
year = {2024}
}
Comments
Authors Yanik Herrmann and Julius Fischer contributed equally, 14 pages, 9 figures