Dynamics of spatial coherence and momentum distribution of polaritons in a semiconductor microcavity under conditions of Bose-Einstein condensation

D. A. Mylnikov, V. V. Belykh, N. N. Sibeldin, V. D. Kulakovskii, C. Schneider, S. Höfling, M. Kamp, A. Forchel

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The dynamics of spatial coherence and momentum distribution of polaritons in the regime of Bose-Einstein condensation in a GaAs microcavity with embedded quantum wells under nonresonant excitation with picosecond laser pulses are investigated. It is shown that the establishment of the condensate coherence is accompanied by narrowing of the polariton momentum distribution. At the same time, at sufficiently high excitation densities, there is significant qualitative discrepancy between the dynamic behavior of the width of the polariton momentum distribution determined from direct measurements and that calculated from the spatial distribution of coherence. This discrepancy is observed at the fast initial stage of the polariton system kinetics and, apparently, results from the strong spatial nonuniformity of the phase of the condensate wavefunction, which equilibrates on a much longer time scale.
Original languageEnglish
Pages (from-to)513-518
Number of pages6
JournalJETP Letters
Volume101
Issue number8
DOIs
Publication statusPublished - Apr 2015

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