Deep sub-wavelength localization of light and sound in dielectric resonators

Abstract

Optomechanical crystals provide coupling between phonons and photons by confining them to commensurate wavelength-scale dimensions. We present a new concept for designing optomechanical crystals capable of achieving unprecedented coupling rates by confining optical and mechanical waves to deep sub-wavelength dimensions. Our design is based on a dielectric bowtie unit cell with an effective optical/mechanical mode volume of $7.6\times 10^{-3}{(\lambda /n_{\text{Si}})}^3$/$1.2\times 10^{-3}{{\lambda }_{\text{mech}}}^3$. We present results from numerical modeling, indicating a single-photon optomechanical coupling of 2.2 MHz with experimentally viable parameters. Monte Carlo simulations are used to demonstrate the design's robustness against fabrication disorder.

References in corpus (2)

• Optimized optomechanical crystal cavity with acoustic radiation shield
• Optomechanics in an ultrahigh-Q slotted 2D photonic crystal cavity