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Summary form only given. Strong laser-like emission from polaritons in microcavities has been observed and attributed to bosonic enhancement in the emission process (Snellart and Bloch, 1999; Savvidis et al, 2000; Erland et al, 2000). This relies on the bosonic nature of low-density polaritons stimulating the scattering processes by the final-state polariton population. Strong enhancements of the scattering processes have been observed as a result of up to several 100 polaritons per final k-state under angle-resonant pumping conditions (Erland et al, 2000; Stevenson et al, 2000). Energy and wave vector are conserved in the angle-resonant process by scattering of two k/sub /spl par//=k/sub /spl par/,res/ polaritons into 2k/sub /spl par/,res/ and k/sub /spl par///spl sim/0 states, respectively, the latter resulting in the strong secondary emission that is studied in this work.

technical digest. summaries of papers presented at the quantum electronics and laser science conference. postconference technical digest (ieee cat. no.01ch37172)

Extended coherence lifetimes in microcavities under angle-resonant pumping conditions