scholarly journals Enhancing high frequency sensitivity of gravitational wave detectors with a Sagnac interferometer

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Teng Zhang ◽  
Denis Martynov ◽  
Haixing Miao ◽  
Stefan Danilishin
Keyword(s):  
Gravitational Wave ◽  
High Frequency ◽  
Sagnac Interferometer ◽  
Frequency Sensitivity ◽  
Gravitational Wave Detectors

scholarly journals Gravitational wave detectors with broadband high frequency sensitivity

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Michael A. Page ◽  
Maxim Goryachev ◽  
Haixing Miao ◽  
Yanbei Chen ◽  
Yiqiu Ma ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
White Light ◽  
High Frequency ◽  
Phononic Crystal ◽  
Optical Power ◽  
Light Signal ◽  
Acoustic Cavity ◽  
Silicon Nitride Membrane ◽  
Gravitational Wave Detectors ◽  
Crystal Quartz

AbstractGravitational waves from the neutron star coalescence GW170817 were observed from the inspiral, but not the high frequency postmerger nuclear matter motion. Optomechanical white light signal recycling has been proposed for achieving broadband sensitivity in gravitational wave detectors, but has been reliant on development of suitable ultra-low loss mechanical components. Here we show demonstrated optomechanical resonators that meet loss requirements for a white light signal recycling interferometer with strain sensitivity below 10−24 Hz−1/2 at a few kHz. Experimental data for two resonators are combined with analytic models of interferometers similar to LIGO to demonstrate enhancement across a broader band of frequencies versus dual-recycled Fabry-Perot Michelson detectors. Candidate resonators are a silicon nitride membrane acoustically isolated by a phononic crystal, and a single-crystal quartz acoustic cavity. Optical power requirements favour the membrane resonator, while thermal noise performance favours the quartz resonator. Both could be implemented as add-on components to existing detectors.

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