A new method of probing mechanical losses of coatings at cryogenic temperatures

Abstract

A new method of probing mechanical losses and comparing the corresponding deposition processes of metallic and dielectric coatings in 1-100 MHz frequency range and cryogenic temperatures is presented. The method is based on the use of extremely high-quality quartz acoustic cavities whose internal losses are orders of magnitude lower than any available coatings nowadays. The approach is demonstrated for Chromium, Chromium/Gold and a multilayer tantala/silica coatings. The ${\mathrm{Ta}}_2{\mathrm{O}}_5/\mathrm{Si}{\mathrm{O}}_2$ coating has been found to exhibit a loss angle lower than $1.6\times 10^{-5}$ near 30 {\rm MHz} at 4 {\rm K}. The results are compared to the previous measurements.

References in corpus (14)

• Cavity Optomechanics
• Thermal noise in interferometric gravitational wave detectors due to dielectric optical coatings
• Mechanical Loss in Tantala/Silica Dielectric Mirror Coatings
• Sound of Dark Matter: Searching for Light Scalars with Resonant-Mass Detectors
• Gravitational Wave Detection with High Frequency Phonon Trapping Acoustic Cavities
• Extremely Low Loss Phonon-Trapping Cryogenic Acoustic Cavities for Future Physical Experiments
• Observation of Rayleigh phonon scattering through excitation of extremely high overtones in low-loss cryogenic acoustic cavities for hybrid quantum systems
• Measurement of the mechanical loss of a cooled reflective coating for gravitational wave detection
• Radiation-pressure self-cooling of a micromirror in a cryogenic environment
• Acoustic tests of Lorentz symmetry using quartz oscillators
• Material loss angles from direct measurements of broadband thermal noise
• Investigation of the Young's modulus and thermal expansion of amorphous titania-doped tantala films
• Effects of Geometry on Near Quantum Ground State Behaviour of Phonon-Trapping Acoustic Cavities
• Quartz-superconductor quantum electromechanical system

Cited by in corpus (4)

• Bulk crystalline optomechanics
• Probing the acoustic losses of graphene with a low-loss quartz bulk-acoustic-wave resonator at cryogenic temperatures
• Electrode configuration and electrical dissipation of mechanical energy in quartz crystal resonators
• Loss Mechanisms in High-coherence Multimode Mechanical Resonators Coupled to Superconducting Circuits