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 (16)

• Cavity Optomechanics
• Laser cooling of a nanomechanical oscillator into its quantum ground state
• Optomechanical Crystals
• Quantum transduction of optical photons from a superconducting qubit
• Non-classical correlations between single photons and phonons from a mechanical oscillator
• Deterministic design of wavelength scale, ultra-high Q photonic crystal nanobeam cavities
• Optimized optomechanical crystal cavity with acoustic radiation shield
• Phononic bandgap nano-acoustic cavity with ultralong phonon lifetime
• Optomechanics in an ultrahigh-Q slotted 2D photonic crystal cavity
• Pulsed excitation dynamics of an optomechanical crystal resonator near its quantum ground-state of motion
• Quantum interference of electromechanically stabilized emitters in nanophotonic devices
• Design of dispersive optomechanical coupling and cooling in ultrahigh-Q/V slot-type photonic crystal cavities
• Slot-mode-coupled optomechanical crystals
• Strong optomechanical coupling in a slotted photonic crystal nanobeam cavity with an ultrahigh quality factor-to-mode volume ratio
• Enhanced photon-phonon coupling via dimerization in one-dimensional optomechanical crystals
• Acoustic diamond resonators with ultra-small mode volumes

Cited by in corpus (2)

• Nonlinear Sideband Cooling to a Cat State of Motion
• Nonclassical mechanical states in cavity optomechanics in the single-photon strong-coupling regime