Thermal noise in complex systems
arXiv:1809.10720
Abstract
We present a method to calculate the power spectral density of Brownian noise in complex optomechanical systems using Levin's approach of virtual pressure and present first mechanical loss measurements for high-purity GaAs over a wide temperature range from 7 K to 250 K. The loss reveals three Debye loss peaks. Each peak corresponds to an Arrhenius-like relaxation process with activation energies of 17.9 meV, 65.4 meV and 123 meV respectively. Additional light induced damping was observed for photon energies below and above the fundamental gap of GaAs in contrast to observations by Okamoto et al.
References in corpus (6)
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- The Sensitivity of the Advanced LIGO Detectors at the Beginning of Gravitational Wave Astronomy
- Internal thermal noise in the LIGO test masses : a direct approach
- Thermal Noise Reduction and Absorption Optimisation via Multi-Material Coatings
- Brownian Thermal Noise in Functional Optical Surfaces
- Waveguide grating mirror in a fully suspended 10 meter Fabry-Perot cavity