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arXiv · 2403.08510

An optically defined phononic crystal defect

Thomas J. Clark·Simon Bernard·Jiaxing Ma·Vincent Dumont·Jack C. Sankey
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Abstract

We demonstrate a mechanical crystal with an optically programmable defect mode. By applying an optical spring to a single unit cell of a phononic crystal membrane, we smoothly transfer a single mechanical mode into the bandgap, thereby localizing its spatial profile from one spanning the entire crystal to one confined within a few unit cells. This localization is evidenced by an enhanced mechanical frequency shift commensurate with a 37-fold reduction in the mode's participating mass. Our results lay groundwork for a new class of optomechanical systems that control mechanical mode profile and participating mass.

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Thomas J. Clark, Simon Bernard, Jiaxing Ma, Vincent Dumont, Jack C. Sankey. 2024-03-13. An optically defined phononic crystal defect. https://arxiv.org/abs/2403.08510

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