Abstract

Strong laser-like emission from polaritons in microcavities has been observed and attributed to bosonic enhancement in the emission process.^1-3 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.^4,5 Energy and wave vector are conserved in the angle-resonant process by scattering of two k_║ = k_║,res polaritons into 2k_║,res and k_║ ~ 0 states, respectively, the latter resulting in the strong secondary emission that is studied in this work.

© 2001 Optical Society of America