Rm. Stevenson et al., Continuous wave observation of massive polariton redistribution by stimulated scattering in semiconductor microcavities, PHYS REV L, 85(17), 2000, pp. 3680-3683
A massive redistribution of the polariton occupancy to two specific wave ve
ctors, zero and similar to3.9 X 10(4) cm(-1), is observed under conditions
of continuous wave excitation of a semiconductor microcavity. The "condensa
tion" of the polaritons to the two specific states arises from stimulated s
cattering at final state occupancies of order unity. The stimulation phenom
ena, arising due to the bosonic character of the polariton quasiparticles,
occur for conditions of resonant excitation of the lower polariton branch.
High energy nonresonant excitation, as in most previous work, instead leads
to conventional lasing in the vertical cavity structure.