Thermo-optical bistability in silicon micro-cantilevers
Optics
2021-06-02 v2 Applied Physics
Abstract
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-P\'erot 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.
Cite
@article{arxiv.2101.12157,
title = {Thermo-optical bistability in silicon micro-cantilevers},
author = {Basile Pottier and Ludovic Bellon},
journal= {arXiv preprint arXiv:2101.12157},
year = {2021}
}
Comments
Submitted to SciPost Physics