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)

Abstract

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
Volume99
Issue number14
DOIs
Publication statusPublished - 3 Oct 2011
Externally publishedYes

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