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arXiv · 1603.05721

Design of tunable GHz-frequency optomechanical crystal resonators

Hannes Pfeifer·Taofiq Paraiso·Leyun Zang·Oskar Painter
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Abstract

We present a silicon optomechanical nanobeam design with a dynamically tunable acoustic mode at 10.2 GHz. The resonance frequency can be shifted by 90 kHz/V^2 with an on-chip capacitor that was optimized to exert forces up to 1 $μ$N at 10 V operation voltage. Optical resonance frequencies around 190 THz with Q factors up to $2.2 \times 10^6$ place the structure in the well-resolved sideband regime with vacuum optomechanical coupling rates up to $g_0/2π= 353$ kHz. Tuning can be used, for instance, to overcome variation in the device-to-device acoustic resonance frequency due to fabrication errors, paving the way for optomechanical circuits consisting of arrays of optomechanical cavities.

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Hannes Pfeifer, Taofiq Paraiso, Leyun Zang, Oskar Painter. 2016-03-17. Design of tunable GHz-frequency optomechanical crystal resonators. https://doi.org/10.1364/oe.24.011407

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