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Time‐Resolved Luminescence of Exciton‐Polaritons in Solid Xenon
Author(s) -
Varding D.,
Reimand I.,
Zimmerer G.
Publication year - 1994
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221850126
Subject(s) - exciton , luminescence , scattering , polariton , atomic physics , excitation , phonon , biexciton , exponential decay , trapping , molecular physics , physics , materials science , condensed matter physics , optics , nuclear physics , ecology , quantum mechanics , biology
The decay of excitons in solid Xe is investigated with time and spectrally resolved luminescence as a function of temperature and photon energy of excitation. The luminescence of free excitons exceeds the self‐trapped exciton luminescence by a factor of 50 (peak‐to‐peak). The FE‐decay curves yield a non‐exponential behaviour. They can be reproduced with Monte‐Carlo simulations of the exciton‐polariton transport to the sample/vacuum interface, taking into account phonon scattering and trapping. A new upper limit for the intrinsic self‐trapping rate in the lower 10 7 s −1 range and a surprisingly large experimental value for the scattering length ( ≈ 100 nm at T = 5 K) are deduced. It is indispensable to discuss the decay of excitons in solid Xe in terms of the exciton‐polariton model.