Nonequilibrium condensates and lasers without inversion

Exciton-polariton lasers

A. Imamoglu, R. J. Ram, Stanley K H Pau, Y. Yamamoto

Research output: Contribution to journalArticle

417 Citations (Scopus)

Abstract

We analyze elementary properties of exciton and polariton lasers - devices that generate coherent optical and matter waves using final-state stimulation of exciton-phonon scattering. First we discuss the relation between the conditions for the onset of equilibrium and nonequilibrium excitonic condensates. Provided that the thermal de Broglie wavelength λT exceeds the exciton Bohr radius aB, an exciton laser operates without electronic population inversion. In contrast to previous proposals, this is a different type of laser without inversion which utilizes many-body coherences. When the excitonic character of the polariton branch vanishes, a polariton laser becomes indistinguishable from a photon laser.

Original languageEnglish (US)
Pages (from-to)4250-4256
Number of pages7
JournalPhysical Review A
Volume53
Issue number6
StatePublished - Jun 1996
Externally publishedYes

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polaritons
condensates
excitons
inversions
lasers
de Broglie wavelengths
population inversion
stimulation
proposals
radii
photons
scattering
electronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Nonequilibrium condensates and lasers without inversion : Exciton-polariton lasers. / Imamoglu, A.; Ram, R. J.; Pau, Stanley K H; Yamamoto, Y.

In: Physical Review A, Vol. 53, No. 6, 06.1996, p. 4250-4256.

Research output: Contribution to journalArticle

Imamoglu, A, Ram, RJ, Pau, SKH & Yamamoto, Y 1996, 'Nonequilibrium condensates and lasers without inversion: Exciton-polariton lasers', Physical Review A, vol. 53, no. 6, pp. 4250-4256.
Imamoglu, A. ; Ram, R. J. ; Pau, Stanley K H ; Yamamoto, Y. / Nonequilibrium condensates and lasers without inversion : Exciton-polariton lasers. In: Physical Review A. 1996 ; Vol. 53, No. 6. pp. 4250-4256.
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