Highly reflective low-noise etalon-based meta-mirror

Abstract

We present a concept of a mirror for the application in high-reflectivity low-noise instruments such as interferometers. The concept is based on an etalon with a metasurface (meta-etalon) on the front and a conventional multilayer stack on the rear surface. The etalon in combination with the metasurface enables a dedicated spatial weighing of the relevant thermal noise processes and by this a substantial reduction of the overall read out thermal noise. We exemplary illustrate the benefit of the proposed etalon for thermal noise in two applications: The test masses of the Einstein Telescope gravitational wave detector and a single-crystalline cavity for laser frequency stabilization. In the Einstein Telescope the thermal noise of the etalon even at room temperature outperforms existing concepts for operation temperatures at 10K. For the laser stabilization cavity, a reduction of the modified Allan deviation of an order of magnitude is predicted.

arXiv comment11 pages, 8 figures, 6 tables

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Cited by in corpus (8)

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• Key signal contributions in photothermal deflection spectroscopy
• Gravitational light deflection in Earth-based laser cavity experiments
• Optical ultra-stable optical clock cavities as resonant mass gravitational wave detectors in search for new physics
• Impact of Earth's gravity on Gaussian beam propagation in hemispherical cavities
• Mechanical loss and stability analysis of NEXCERA in ultra-stable optical cavities