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Article Dans Une Revue Nature Nanotechnology Année : 2014

Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system

Résumé

Recent progress in nanotechnology has allowed to fabricate new hybrid systems where a single two-level system is coupled to a mechanical nanoresonator. In such systems the quantum nature of a macroscopic degree of freedom can be revealed and manipulated. This opens up appealing perspectives for quantum information technologies, and for the exploration of quantum-classical boundary. Here we present the experimental realization of a monolithic solid-state hybrid system governed by material strain: a quantum dot is embedded within a nanowire featuring discrete mechanical resonances corresponding to flexural vibration modes. Mechanical vibrations result in a time-varying strain field that modulates the quantum dot transition energy. This approach simultaneously offers a large light extraction efficiency and a large exciton-phonon coupling strength $g_0$. By means of optical and mechanical spectroscopy, we find that $g_0/2\pi$ is nearly as large as the mechanical frequency, a criterion which defines the ultra-strong coupling regime.
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hal-00949375 , version 1 (12-02-2024)

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Inah Yeo, Pierre-Louis de Assis, Arnaud Gloppe, Eva Dupont-Ferrier, Pierre Verlot, et al.. Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system. Nature Nanotechnology, 2014, 9 (2), pp.106. ⟨10.1038/nnano.2013.274⟩. ⟨hal-00949375⟩
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