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

Yeo, I.; de Assis, P-L.; Gloppe, A.; Dupont-Ferrier, E.; Verlot, P.; Malik, N. S.; Dupuy, E.; Claudon, J.; G�rard, J-M.; Auff�ves, A.; Nogues, G.; Seidelin, S.; Poizat, J-Ph.; Arcizet, O.; Richard, M.

Abstract

Recent progress in nanotechnology has allowed the fabrication of new hybrid systems in which 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 the 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 that features 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 g0. By means of optical and mechanical spectroscopy, we find that g0/2π is nearly as large as the mechanical frequency, a criterion that defines the ultrastrong coupling regime. © 2014 Macmillan Publishers Limited. All rights reserved.

Citation

Yeo, I., de Assis, P., Gloppe, A., Dupont-Ferrier, E., Verlot, P., Malik, N. S., …Richard, M. (2014). Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system. Nature Nanotechnology, 9(2), 106-110. https://doi.org/10.1038/nnano.2013.274

• Journal Article Type: Article
• Acceptance Date: Nov 14, 2013
• Online Publication Date: Dec 22, 2013
• Publication Date: Feb 1, 2014
• Deposit Date: Dec 10, 2018
• Journal: Nature Nanotechnology
• Print ISSN: 1748-3387
• Electronic ISSN: 1748-3395
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 2
• Pages: 106-110
• DOI: https://doi.org/10.1038/nnano.2013.274
• Public URL: https://nottingham-repository.worktribe.com/output/1396660
• Publisher URL: https://www.nature.com/articles/nnano.2013.274