https://doi.org/10.1051/epjconf/202430905004
Brick-Based Silicon Optomechanical Cavity Sensor for Nanoparticles Mass Detection
Nanophotonics Technology Center, Universitat Politècnica de València, 46022 Valencia, Spain
* Corresponding author: agramar1@ntc.upv.es
Published online: 31 October 2024
A novel design for an optomechanical cavity consisting of a series of rectangular silicon nanobricks, with each brick acting as an independent mechanical resonator but all coupled to a same optical field, is proposed, and numerically demonstrated. Each brick is placed on top of a thin silica pillar that provides mechanical support whilst isolates the individual mechanical resonances. The mass sensing capabilities of this cavity are studied through numerical simulations, proving that a point mass approximation can be used for silica nanoparticles with radius smaller than 100 nm, and that different nanoparticles can be measured independently but simultaneously.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
