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arXiv · 2202.00833

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

Alkim Bozkurt·Chaitali Joshi·Mohammad Mirhosseini
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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 $7.6 \times 10^{-3} {(\lambda/n_{\textrm{Si}})}^3$/$ 1.2 \times 10^{-3} {\lambda_{\textrm{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.

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Alkim Bozkurt, Chaitali Joshi, Mohammad Mirhosseini. 2022-02-02. Deep sub-wavelength localization of light and sound in dielectric resonators. https://doi.org/10.1364/oe.455248

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