Optomechanical resonators suffer from the dissipation of mechanical energy through the necessary anchors enabling the suspension of the structure. Here we show that such structural loss in an optomechnaical oscillator can be almost completely eliminated through the destructive interference of elastic waves using dual-disk resonators. We also present both analytical and numerical model that predicts the observed interference of elastic waves. Our experimental data reveal unstressed SiN devices with mechanical Q-factors up to 104 at mechanical frequencies of f=102 MHz (fQ=1012) at room temperature.
@article{arxiv.1406.0029,
title = {Eliminating Structural Loss in Optomechanical Resonators Using Elastic Wave Interference},
author = {Mian Zhang and Gustavo Luiz and Shreyas Shah and Gustavo Wiederhecker and Michal Lipson},
journal= {arXiv preprint arXiv:1406.0029},
year = {2015}
}