Barium fluoride whispering-gallery-mode disk-resonator with one billion quality-factor
Abstract
We demonstrate a monolithic optical whispering gallery mode resonator fabricated with barium fluoride (BaF) with an ultra-high quality () factor above at nm, and measured with both the linewidth and cavity-ring-down methods. Vertical scanning optical profilometry shows that the root mean square surface roughness of nm is achieved for our mm-size disk. To the best of our knowledge, we show for the first time that one billion -factor is achievable by precision polishing in relatively soft crystals with mohs hardness of ~. We show that complex thermo-optical dynamics can take place in these resonators. Beside usual applications in nonlinear optics and microwave photonics, high energy particle scintillation detection utilizing monolithic BaF resonators potentially becomes feasible.
Keywords
Cite
@article{arxiv.1501.02324,
title = {Barium fluoride whispering-gallery-mode disk-resonator with one billion quality-factor},
author = {Guoping Lin and Souleymane Diallo and Rémi Henriet and Maxime Jacquot and Yanne K. Chembo},
journal= {arXiv preprint arXiv:1501.02324},
year = {2015}
}