Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system
arXiv:1306.4209 · doi:10.1038/nnano.2013.274
Abstract
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 . By means of optical and mechanical spectroscopy, we find that is nearly as large as the mechanical frequency, a criterion which defines the ultra-strong coupling regime.
6 pages, 3 figures
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Cited by in corpus (125)
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