TY - JOUR
T1 - Nonequilibrium condensates and lasers without inversion
T2 - Exciton-polariton lasers
AU - Imamog¯lu, A.
AU - Ram, R. J.
AU - Pau, S.
AU - Yamamoto, Y.
PY - 1996
Y1 - 1996
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 [Formula Presented] exceeds the exciton Bohr radius [Formula Presented], 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 [Formula Presented] exceeds the exciton Bohr radius [Formula Presented], 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.
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U2 - 10.1103/PhysRevA.53.4250
DO - 10.1103/PhysRevA.53.4250
M3 - Article
AN - SCOPUS:0642326391
SN - 1050-2947
VL - 53
SP - 4250
EP - 4253
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
ER -