Multiphysics optomechanical sensing of a liquid on the micron scale
Abstract
We present an optomechanical device platform for characterization of optical, thermal, and rheological properties of fluids on the micron scale. A suspended silicon microdisk resonator with a vibrating mass of 100 fg and an effective measurement volume of less than a pL is used to monitor properties of different fluids at rest. By employing analytical models for thermo-optical effects, thermal diffusion and fluid-structure interactions, our platform determines the refractive index, thermal conductivity, viscosity, density and compressibility of the fluid, in a compact measurement setup. A single measurement takes as short as 70 microseconds, and the employed power can be less than 100 microwatts, guaranteeing measurement at rest and in thermal equilibrium.
Keywords
Cite
@article{arxiv.2503.10139,
title = {Multiphysics optomechanical sensing of a liquid on the micron scale},
author = {Hamidreza Neshasteh and Amideddin Mataji-Kojouri and Clément Le Fur and Ilan Shlesinger and Marco Ravaro and Marc Gély and Sébastien Hentz and Guillaume Jourdan and Ivan Favero},
journal= {arXiv preprint arXiv:2503.10139},
year = {2025}
}