Quantum dot opto-mechanics in a fully self-assembled nanowire

Abstract

We show that fully self-assembled optically-active quantum dots (QDs) embedded in MBE-grown GaAs/AlGaAs core-shell nanowires (NWs) are coupled to the NW mechanical motion. Oscillations of the NW modulate the QD emission energy in a broad range exceeding 14 meV. Furthermore, this opto-mechanical interaction enables the dynamical tuning of two neighboring QDs into resonance, possibly allowing for emitter-emitter coupling. Both the QDs and the coupling mechanism -- material strain -- are intrinsic to the NW structure and do not depend on any functionalization or external field. Such systems open up the prospect of using QDs to probe and control the mechanical state of a NW, or conversely of making a quantum non-demolition readout of a QD state through a position measurement.

20 pages, 6 figures

References in corpus (10)

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• Observation of strong coupling between a micromechanical resonator and an optical cavity field
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• Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator
• Feedback cooling of a cantilever's fundamental mode below 5 mK
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• Back-action evasion and squeezing of a mechanical resonator using a cavity detector
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• Long Distance Coupling of a Quantum Mechanical Oscillator to the Internal States of an Atomic Ensemble
• Dynamics of a mesoscopic nuclear spin ensemble interacting with an optically driven electron spin
• Strain-gradient mapping of semiconductor quantum dots
• Perfect coherent transfer in an on-chip reconfigurable nanoelectromechanical network
• Exciton Footprint of Self-assembled AlGaAs Quantum Dots in Core-Shell Nanowires
• Deterministic nonclassicality for quantum mechanical oscillators in thermal states
• Non-classicality tests and entanglement witnesses for macroscopic mechanical superposition states
• Strain-induced exciton decomposition and anisotropic lifetime modulation in a GaAs micromechanical resonator