Optical phonon lasing in semiconductor double quantum dots

Rin Okuyama, Mikio Eto, Tobias Brandes

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Article number013704
JournalJournal of the Physical Society of Japan
Volume82
Issue number1
DOIs
Publication statusPublished - 2013 Jan

Fingerprint

lasing
quantum dots
decay rates
pumping
carbon nanotubes
cavities
electronics
electrons

Keywords

  • Cavity quantum electrodynamics
  • Franck-Condon effect
  • Microlaser
  • Optical phonon
  • Phononassisted transport
  • Polaron
  • Quantum dot

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Optical phonon lasing in semiconductor double quantum dots. / Okuyama, Rin; Eto, Mikio; Brandes, Tobias.

In: Journal of the Physical Society of Japan, Vol. 82, No. 1, 013704, 01.2013.

Research output: Contribution to journalArticle

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AB - 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.

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