Journal
NANO LETTERS
Volume 14, Issue 8, Pages 4454-4460Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl501413t
Keywords
Hybrid system; quantum dot; nanowire; self-assembly; strain; opto-mechanics
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Funding
- Canton Aargau
- Swiss NSF [200020-140478]
- National Center of Competence in Research for Quantum Science and Technology (NCCR-QSIT)
- D-A-CH program of the Swiss NSF [132506]
- ERC Starting Grant UpCon
- ERC Starting Grant NWScan [334762]
- Swiss National Science Foundation (SNF) [200020_140478] Funding Source: Swiss National Science Foundation (SNF)
- European Research Council (ERC) [334762] Funding Source: European Research Council (ERC)
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We show that 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, i.e. 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 nondemolition readout of a QD state through a position measurement.
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