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Tartakovskii, A.I.; Emam-Ismail, M.; Stevenson, R.M.; Skolnick, M.S.; Astratov, V.N.; Whittaker, D.M.; Baumberg, J.J.; Roberts, J.S. (2000)
Publisher: American Institute of Physics
Languages: English
Types: Article

Classified by OpenAIRE into

arxiv: Physics::Optics, Condensed Matter::Other, Condensed Matter::Quantum Gases, Condensed Matter::Materials Science
A polariton relaxation bottleneck is observed in angle-resolved measurements of photoluminescence emission from a semiconductor microcavity. For low power laser excitation, low k polariton states are found to have a very small population relative to those at high k. The bottleneck is found to be strongly suppressed at higher powers in the regime of superlinear emission of the lower polariton states. Evidence for the important role of carrier-carrier scattering in suppression of the bottleneck is presented.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

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    • 13 The population NLP(k) is related to the population in the measured angular range (,2°), NLP(F), by NLP(k) ;NLP(F)/cos(F). The small 1/cos(F) correction is applied to the data plotted in Fig. 3.
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    • 15 A clear observation of a stimulated polariton-polariton scattering process in MC's has recently been reported in ultrafast pumpprobe experiments. See P. N. Savvidis, J. J. Baumberg, R. M. Stevenson, M. S. Skolnick, D. M. Whittaker, and J. S. Roberts, Phys. Rev. Lett. 84, 1547 ~2000!. Also, experimental evidence of stimulated scattering of excitons into polariton states has been obtained; R. Huang, F. Tassone, and Y. Yamamoto, Phys. Rev. B 61, R7854 ~2000!. The stimulated processes identified in these works involve polariton-polariton and exciton-exciton scattering, respectively, consistent with the present conclusions.
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