title: Design of tunable GHz-frequency optomechanical crystal resonators.
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/V2with an on-chip capacitor that was optimized to exert forces up to 1 µN at 10 V operation voltage. Optical resonance frequencies around 190 THz with Q-factors up to 2.2 × 106place the structure in the well-resolved sideband regime with vacuum optomechanical coupling rates up to g0/2π = 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.
authors.forename: Hannes
authors.initials: H
authors.lastname: Pfeifer
authors.forename: Taofiq
authors.initials: T
authors.lastname: Paraïso
authors.forename: Leyun
authors.initials: L
authors.lastname: Zang
authors.forename: Oskar
authors.initials: O
authors.lastname: Painter