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 language | English (US) |
|---|---|
| Pages (from-to) | 4250-4256 |
| Number of pages | 7 |
| Journal | Physical Review A |
| Volume | 53 |
| Issue number | 6 |
| State | Published - Jun 1996 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Nonequilibrium condensates and lasers without inversion
T2 - Exciton-polariton lasers
AU - Imamoglu, A.
AU - Ram, R. J.
AU - Pau, Stanley K H
AU - Yamamoto, Y.
PY - 1996/6
Y1 - 1996/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0642326391&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0642326391&partnerID=8YFLogxK
M3 - Article
VL - 53
SP - 4250
EP - 4256
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 6
ER -