Abstract
We discuss the thermalization of the polariton population from a bulk
GaN lambda/2 microcavity at room temperature. Simultaneous optical
measurements of reflectivity and photoluminescence (PL), as well
as time resolved measurements, reveal strong light-matter coupling.
Transfer matrix theory is used to calculate reflectivity, absorption,
and transmission coefficients for the structure. The PL emission
is found to be thermalized, despite its very short lifetime, suggesting
the existence of very fast energy relaxation channels.
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