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 [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.
Original language | English (US) |
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Pages (from-to) | 4250-4253 |
Number of pages | 4 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 53 |
Issue number | 6 |
DOIs | |
State | Published - Jan 1 1996 |
Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics