Abstract
We present experimental evidence of spontaneous buildup of coherent exciton polariton population in a microcavity, i.e., an exciton polariton laser. The laser phase transition was confirmed by the increased differential quantum efficiency and decreased linewidth of the lasing polariton mode due to onset of final-state stimulations and the decreased differential quantum efficiency of a nonlasing polariton due to onset of gain clamping at threshold. The exciton polariton laser is distinctly different from an optical laser because of its density-dependent scattering mechanism. The rate equations, taking into account phonon-assisted polariton emission and the polariton-reservoir exciton scattering rate, explain the measurement results well.
| Original language | English (US) |
|---|---|
| Pages (from-to) | R1789-R1792 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 54 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 1996 |
| Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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Pau, S., Cao, H., Jacobson, J., Björk, G., Yamamoto, Y., & Imamoğlu, A. (1996). Observation of a laserlike transition in a microcavity exciton polariton system. Physical Review A - Atomic, Molecular, and Optical Physics, 54(3), R1789-R1792. https://doi.org/10.1103/PhysRevA.54.R1789