Study on electro-optic noise in crystalline coatings toward future gravitational wave detectors

Satoshi Tanioka, Daniel Vander-Hyde, Garrett D. Cole, Steven D. Penn, Stefan W. Ballmer

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish (US)
Article number022003
JournalPhysical Review D
Volume107
Issue number2
DOIs
StatePublished - Jan 15 2023

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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