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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 3261–3270

Selective generation of ultracold high-density 1s orthoexcitons in Cu2O with phase-modulated pulse using acousto-optic programmable filter

Kosuke Yoshioka, Ken Miyashita, and Makoto Kuwata-Gonokami  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 3261-3270 (2014)

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Ultracold and high-density 1s orthoexcitons in semiconductor cuprous oxide are prepared via resonant two-photon absorption of a phase-tailored femtosecond pulse, by utilizing an acousto-optic programmable dispersive filter. The stability of the quantum degenerate exciton gas is studied using excitonic Lyman spectroscopy. A density of 1016 cm−3 is realized without creating hot carriers, and the Lyman spectrum remains unchanged at this density. This result assures the stability of a spontaneous Bose–Einstein condensate of excitons at sub-Kelvin temperatures.

© 2014 Optical Society of America

OCIS Codes
(230.1040) Optical devices : Acousto-optical devices
(320.5540) Ultrafast optics : Pulse shaping
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(020.1475) Atomic and molecular physics : Bose-Einstein condensates

ToC Category:
Atomic and Molecular Physics

Original Manuscript: November 25, 2013
Revised Manuscript: January 24, 2014
Manuscript Accepted: January 24, 2014
Published: February 4, 2014

Kosuke Yoshioka, Ken Miyashita, and Makoto Kuwata-Gonokami, "Selective generation of ultracold high-density 1s orthoexcitons in Cu2O with phase-modulated pulse using acousto-optic programmable filter," Opt. Express 22, 3261-3270 (2014)

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