561 citations · 840 across the 17 of their papers we have counts for
6 papers · 1 filter
Controlling a whispering gallery doublet mode avoided frequency crossing: Strong coupling between photon bosonic and spin degrees of freedom
Maxim Goryachev, Warrick G. Farr, Daniel L. Creedon +1
A combination of electron spin interactions in a magnetic field allows us to control the resonance frequencies of a high-Q Whispering Gallery (WG) cavity mode doublet, resulting in…
Giant -factors of Natural Impurities in Synthetic Quartz
Maxim Goryachev, Warrick G. Farr, Michael E. Tobar
We report the observation of -factors of natural paramagnetic impurities in a pure synthetic quartz crystal at milli-Kelvin temperatures. Measurements are made by performing spe…
Spin bath maser in a cryogenically cooled sapphire whispering gallery mode resonator
J. Bourhill, K. Benmessai, M. Goryachev +3
We report the observation of a mechanism of maser generation in an ensemble of inter-coupled, inhomogeneously broadened two-level systems, enhanced by high quality factor electroma…
Ultrasensitive microwave spectroscopy of paramagnetic impurities of sapphire crystals at millikelvin temperatures
Warrick G. Farr, Daniel L. Creedon, Maxim Goryachev +2
Progress in the emerging field of engineered quantum systems requires the development of devices that can act as quantum memories. The realisation of such devices by doping solid s…
Anomalously Strong Nonlinearity of Unswept Quartz Acoustic Cavities at Liquid Helium Temperatures
M. Goryachev, Warrick G. Farr, Eugene N. Ivanov +1
We demonstrate a variety of nonlinear phenomena at extremely low powers in cryogenic acoustic cavities fabricated from quartz material, which have not undergone any electrodiffusio…
Hybrid Electron Spin Resonance and Whispering Gallery Mode Resonance Spectroscopy of Fe3+ in Sapphire
Karim Benmessai, Warrick G. Farr, Daniel L. Creedon +4
The development of a new era of quantum devices requires an understanding of how paramagnetic dopants or impurity spins behave in crystal hosts. Here, we describe a new spectroscop…