1 research outputs found
Ultrafast Dynamics of Polariton Cooling and Renormalization in an Organic Single-Crystal Microcavity under Nonresonant Pumping
Microcavity systems with organic
luminescent materials have a hot
prospect for room-temperature cavity-polariton devices. The polariton
dispersion relation of organic microcavities is significantly different
from that of inorganic microcavities due to the strong localization
of Frenkel excitons. Also photoexcited particles will undergo a different
cooling mechanism until they reach the polariton ground state. In
the characterization of efficient polariton condensates, therefore,
the polariton cooling dynamics as well as the kinetics of the polariton
eigenstate should be measured. Here we present experimental studies
on ultrafast dynamics of cavity polaritons in an organic single-crystal
microcavity under nonresonant pumping. In time-resolved photoluminescence
measurements we observed, for the first time, an ultrafast dynamics
of stimulated cooling of the organic cavity polariton. Transient transmission
measurement enabled us to investigate the detailed renormalization
dynamics of the polariton eigenstate. The results clearly demonstrated
the prospect of organic microcavities for room-temperature polaritonic
devices