Inducing micromechanical motion by optical excitation of a single quantum dot

Abstract

Hybrid quantum optomechanical systems offer an interface between a single two-level system and a macroscopical mechanical degree of freedom. In this work, we build a hybrid system made of a vibrating microwire coupled to a single semiconductor quantum dot (QD) via material strain. It was shown a few years ago, that the QD excitonic transition energy can thus be modulated by the microwire motion. We demonstrate here the reverse effect, whereby the wire is set in motion by the resonant drive of a single QD exciton with a laser modulated at the mechanical frequency. The resulting driving force is found to be almost 3 orders of magnitude larger than radiation pressure. From a fundamental aspect, this state dependent force offers a convenient strategy to map the QD quantum state onto a mechanical degree of freedom.

arXiv comment16 pages, 12 figures

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• Transduction of single nanomechanical pillar resonators by scattering of surface acoustic waves
• Photon scattering from a quantum acoustically modulated two-level system
• Piezo-orbital backaction force in a rare-earth doped crystal
• Single quantum dot selection and tailor-made photonic device integration using nanoscale focus pinspot
• Spin dynamics of positively charged excitons in Cr${}^{+}$-doped quantum dots probed by resonant photoluminescence
• Temperature mediated back-action in micro- and nanomechanical resonators
• Dark Exciton Giant Rabi Oscillations with no External Magnetic Field
• Topical review on acousto-optical Floquet engineering of single-photon emitters
• Tunable WS${}_2$ Micro-Dome Open Cavity Single Photon Source