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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 g0 reach ultra-large values in the 106 rad/s range.
Highlights
We have investigated the main characteristics of GaAs/AlAs micropillar optomechanical resonators, unveiling a feature-rich mechanical response of the structures
These resonators work at unprecedented high mechanical frequencies, with high quality factors, and in addition can provide very high optomechanical coupling factors
This dependence entails a strong variation of the optomechanical coupling with the radius of the micropillar and has to be taken into account in the design of micropillar-based optomechanical resonators
Summary
“Strong optical-mechanical coupling in a vertical GaAs/AlAs microcavity for subterahertz phonons and near-infrared light,” Phys. “Dynamical optical tuning of the coherent phonon detection sensitivity in DBR-based GaAs optomechanical resonators,” Phys. Senellart, “Controlled light-matter coupling for a single quantum dot embedded in a pillar microcavity using farfield optical lithography,” Phys.
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