We report a thermo-optical bistability observed in silicon micro-cantilevers irradiated by a laser beam with mW powers: reflectivity, transmissivity, absorption, and temperature can change by a factor of two between two stable states for the same input power. The temperature dependency of the absorption at the origin of the bistability results from interferences between internal reflections in the cantilever thickness, acting as a lossy Fabry-Pérot cavity. A theoretical model describing the thermo-optical coupling is presented. The experimental results obtained for silicon cantilevers irradiated in vacuum at two different visible wavelengths are in quantitative agreement with the predictions of this model.
Cited by 4
Maksimov et al., Thermo-optic hysteresis with bound states in the continuum
Phys. Rev. A 106, 063507 (2022) [Crossref]
Pottier et al., Force microscopy cantilevers locally heated in a fluid: Temperature fields and effects on the dynamics
130, 124502 (2021) [Crossref]
Pottier et al., Accelerating the Heat Diffusion: Fast Thermal Relaxation of a Microcantilever
Phys. Rev. Applied 19, 034072 (2023) [Crossref]
Fontana et al., Thermal noise of a cryocooled silicon cantilever locally heated up to its melting point
Phys. Rev. E 103, 062125 (2021) [Crossref]
Authors / Affiliation: mappings to Contributors and OrganizationsSee all Organizations.
- 1 Basile Pottier,
- 1 Ludovic Bellon