Optomechanical crystal with bound states in the continuum

Abstract

Chipscale micro- and nano-optomechanical systems, hinging on the intangible radiation-pressure force, have shown their unique strength in sensing, signal transduction, and exploration of quantum physics with mechanical resonators. Optomechanical crystals, as one of the leading device platforms, enable simultaneous molding of the band structure of optical photons and microwave phonons with strong optomechanical coupling. Here, we demonstrate a new breed of optomechanical crystals in two-dimensional slab-on-substrate structures empowered by mechanical bound states in the continuum (BICs) at 8 GHz. We show symmetry-induced BIC emergence with optomechanical couplings up to $g/2\pi \approx 2.5$ MHz per unit cell, on par with low-dimensional optomechanical crystals. Our work paves the way towards exploration of photon-phonon interaction beyond suspended microcavities, which might lead to new applications of optomechanics from phonon sensing to quantum transduction.

References in corpus (6)

• Optimized optomechanical crystal cavity with acoustic radiation shield
• Laser noise in cavity-optomechanical cooling and thermometry
• Mechanical bound states in the continuum for macroscopic optomechanics
• Anomalous quantum Hall effect of light in Bloch-wave modulated photonic crystals
• Silicon-on-insulator optomechanical microresonator with tight photon and phonon confinement
• Observation of bound states in the continuum in a micromechanical resonator

Cited by in corpus (10)

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• Design of a release-free piezo-optomechanical quantum transducer
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• Quasibound states in the continuum in photonic-crystal-based optomechanical microcavities
• Deployable Nanoelectromechanical Bound States in the Continuum Enabled by GHz Lamb Wave Phononic Crystals on LiNbO3 Thin Films
• Gigahertz modulation of a fully dielectric nonlocal metasurface
• Semiconductor-on-diamond cavities for spin optomechanics
• Robust Topological Bound States in the Continuum in a Quantum Hall Bar with an Anti-dot