Optomechanical properties of GaAs/AlAs micropillar resonators operating in the 18 GHz range

Abstract

Recent experiments demonstrated that GaAs-AlAs based micropillar cavities are promising systems for quantum optomechanics, allowing the simultaneous three-dimensional confinement of near-infrared photons and acoustic phonons in the 18-100 GHz range. Here, we investigate through numerical simulations the optomechanical properties of this new platform. We evidence how the Poisson's ratio and semiconductor-vacuum boundary conditions lead to very distinct features in the mechanical and optical three dimensional confinement. We find a strong dependence of the mechanical quality factor and strain distribution on the micropillar radius, in great contrast to what is predicted and observed in the optical domain. The derived optomechanical coupling constants g_0 reach ultra-large values in the 10^6 rad/s range.

References in corpus (5)

• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
• Controlled light-matter coupling for a single quantum dot embedded in a pillar microcavity using far-field optical lithography
• Optimized optomechanical crystal cavity with acoustic radiation shield
• Strain-gradient mapping of semiconductor quantum dots
• Improved optomechanical disk resonator sitting on a pedestal mechanical shield

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• Elliptical micropillars for efficient generation and detection of coherent acoustic phonons
• Theory of Optomechanical Locking in Driven-Dissipative Coupled Polariton Condensates
• Silicon-on-insulator optomechanical microresonator with tight photon and phonon confinement
• Generating 10-GHz phonons in nanostructured silicon membrane optomechanical cavity