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arXiv · 1701.03321

Efficient anchor loss suppression in coupled near-field optomechanical resonators

Gustavo O. Luiz·Felipe G. S. Santos·Rodrigo S. Benevides·Yovanny A. V. Espinel·Thiago P. M. Alegre·Gustavo S. Wiederhecker
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Abstract

Elastic dissipation through radiation towards the substrate is a major loss channel in micro- and nanomechanical resonators. Engineering the coupling of these resonators with optical cavities further complicates and constrains the design of low-loss optomechanical devices. In this work we rely on the coherent cancellation of mechanical radiation to demonstrate material and surface absorption limited silicon near-field optomechanical resonators oscillating at tens of MHz. The effectiveness of our dissipation suppression scheme is investigated at room and cryogenic temperatures. While at room temperature we can reach a maximum quality factor of 7.61k ($fQ$-product of the order of $10^{11}$~Hz), at 22~K the quality factor increases to 37k, resulting in a $fQ$-product of $2\times10^{12}$~Hz.

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Gustavo O. Luiz, Felipe G. S. Santos, Rodrigo S. Benevides, Yovanny A. V. Espinel, Thiago P. M. Alegre, Gustavo S. Wiederhecker. 2017-01-12. Efficient anchor loss suppression in coupled near-field optomechanical resonators. https://doi.org/10.1364/oe.25.031347

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