Quantum transduction between microwave and optical frequencies is important for connecting superconducting quantum platforms in a quantum network. Ensembles of rare-earth ions are promising candidates to achieve this conversion due to their collective coherent properties at microwave and optical frequencies. Erbium ions are of particular interest because of their telecom wavelength optical transitions that are compatible with fiber communication networks. Here, we report the optical and electron spin properties of erbium doped yttrium orthovanadate (Er3+:YVO4), including high-resolution optical spectroscopy, electron paramagnetic resonance studies and an initial demonstration of microwave to optical conversion of classical fields. The highly absorptive optical transitions and narrow ensemble linewidths make Er3+:YVO4 promising for magneto-optic quantum transduction.
@article{arxiv.2104.01501,
title = {Characterization of Er$^{3+}$:YVO$_{4}$ for microwave to optical transduction},
author = {Tian Xie and Jake Rochman and John G. Bartholomew and Andrei Ruskuc and Jonathan M. Kindem and Ioana Craiciu and Charles Thiel and Rufus Cone and Andrei Faraon},
journal= {arXiv preprint arXiv:2104.01501},
year = {2021}
}