Study on electro-optic noise in crystalline coatings toward future gravitational wave detectors
Abstract
Thermal noise in high-reflectivity mirror coatings is a limiting factor in ground-based gravitational wave detectors. Reducing this coating thermal noise improves the sensitivity of detectors and enriches the scientific outcome of observing runs. Crystalline gallium arsenide and aluminum-alloyed gallium arsenide (referred to as AlGaAs) coatings are promising coating candidates for future upgrades of gravitational wave detectors because of their low coating thermal noise. However, AlGaAs-based crystalline coatings may be susceptible to an electro-optic noise induced by fluctuations in an electric field. We investigated the electro-optic effect in an AlGaAs coating by using a Fabry-Perot cavity, and concluded that the noise level is well below the sensitivity of current and planned gravitational-wave detectors.
Keywords
Cite
@article{arxiv.2210.08381,
title = {Study on electro-optic noise in crystalline coatings toward future gravitational wave detectors},
author = {Satoshi Tanioka and Daniel Vander-Hyde and Garrett D. Cole and Steven D. Penn and Stefan W. Ballmer},
journal= {arXiv preprint arXiv:2210.08381},
year = {2023}
}