Optical Phonon Lasing in Semiconductor Double Quantum Dots
arXiv:1205.6955 · doi:10.7566/JPSJ.82.013704
Abstract
We propose optical phonon lasing for a double quantum dot (DQD) fabricated in a semiconductor substrate. We show that the DQD is weakly coupled to only two LO phonon modes that act as a natural cavity. The lasing occurs for pumping the DQD via electronic tunneling at rates much higher than the phonon decay rate, whereas an antibunching of phonon emission is observed in the opposite regime of slow tunneling. Both effects disappear with an effective thermalization induced by the Franck-Condon effect in a DQD fabricated in a carbon nanotube with a strong electron-phonon coupling.
8 pages, 4 figures
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- Photon-mediated electron transport in hybrid circuit-QED
- A phonon laser utilizing quantum-dot spin states
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