Optical and mechanical mode tuning in an optomechanical crystal with light-induced thermal effects
Abstract
We report on the modification of the optical and mechanical properties of a silicon 1D optomechanical crystal cavity due to thermo-optic effects in a high phonon/photon population regime. The cavity heats up due to light absorption in a way that shifts the optical modes towards longer wavelengths and the mechanical modes to lower frequencies. By combining the experimental optical results with finite-difference time-domain simulations we establish a direct relation between the observed wavelength drift and the actual effective temperature increase of the cavity. By assuming that the Young's modulus decreases accordingly to the temperature increase, we find a good agreement between the mechanical mode drift predicted using a finite element method and the experimental one.
Keywords
Cite
@article{arxiv.1605.07776,
title = {Optical and mechanical mode tuning in an optomechanical crystal with light-induced thermal effects},
author = {D. Navarro-Urrios and J. Gomis-Bresco and N. E. Capuj and F. Alzina and A. Griol and D. Puerto and A. Martínez and C. M. Sotomayor-Torres},
journal= {arXiv preprint arXiv:1605.07776},
year = {2016}
}
Comments
16 pages, 5 figures