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) |
|---|---|
| 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
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Imamog¯lu, A., Ram, R. J., Pau, S., & Yamamoto, Y. (1996). Nonequilibrium condensates and lasers without inversion: Exciton-polariton lasers. Physical Review A - Atomic, Molecular, and Optical Physics, 53(6), 4250-4253. https://doi.org/10.1103/PhysRevA.53.4250