Ultrafast polariton population build-up mediated by molecular phonons in organic microcavities

N. Somaschi, L. Mouchliadis, D. Coles, I. E. Perakis, D. G. Lidzey, P. G. Lagoudakis, P. G. Savvidis

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


A key prerequisite for low-threshold polariton lasing in organic or inorganic microcavity systems is the efficient population of the lower polariton ground state. Here, we report the observation of a resonant phonon-mediated relaxation process which gives rise to nonthermal polariton population with sub 100 fs build-up times. This mechanism is manifested by discrete maxima of the angular-resolved photoluminescence intensity, with corresponding shortening of the photoluminescence rise time at respective phonon resonances. The realization of enhanced relaxation rates in disordered J-aggregate systems is important for developing room temperature organic laser sources with less fabrication complexity than their crystalline counterparts.

Original languageEnglish
Article number143303
JournalApplied Physics Letters
Issue number14
Publication statusPublished - 3 Oct 2011
Externally publishedYes


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