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

Ultrafast polariton population build-up mediated by molecular phonons in organic microcavities
Ultrafast polariton population build-up mediated by molecular phonons in organic microcavities
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.
high-speed optical techniques, microcavity lasers, optical materials, organic semiconductors, phonons, photoluminescence, polaritons, semiconductor lasers
0003-6951
Somaschi, N.
8671acd4-2bd5-4773-9f8d-b52e381aad14
Mouchliadis, L.
abf6206d-d945-421b-ac17-7faf999e8cc2
Coles, D.
58e46bef-2a32-4b6e-b78b-7efede2a93ab
Perakis, I. E.
4c4f6258-47df-4e53-afec-b15cdd7b9dcb
Lidzey, D. G.
4c1f0189-29db-482f-896b-b90f28909baf
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf
Savvidis, P. G.
9922c8cf-9504-4949-822c-767cdcad58be
Somaschi, N.
8671acd4-2bd5-4773-9f8d-b52e381aad14
Mouchliadis, L.
abf6206d-d945-421b-ac17-7faf999e8cc2
Coles, D.
58e46bef-2a32-4b6e-b78b-7efede2a93ab
Perakis, I. E.
4c4f6258-47df-4e53-afec-b15cdd7b9dcb
Lidzey, D. G.
4c1f0189-29db-482f-896b-b90f28909baf
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf
Savvidis, P. G.
9922c8cf-9504-4949-822c-767cdcad58be

Somaschi, N., Mouchliadis, L., Coles, D., Perakis, I. E., Lidzey, D. G., Lagoudakis, P. G. and Savvidis, P. G. (2011) Ultrafast polariton population build-up mediated by molecular phonons in organic microcavities. Applied Physics Letters, 99 (14). (doi:10.1063/1.3645633).

Record type: Article

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.

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More information

Published date: 3 October 2011
Keywords: high-speed optical techniques, microcavity lasers, optical materials, organic semiconductors, phonons, photoluminescence, polaritons, semiconductor lasers

Identifiers

Local EPrints ID: 430539
URI: http://eprints.soton.ac.uk/id/eprint/430539
ISSN: 0003-6951
PURE UUID: 94dadea0-d7fc-4bd9-a760-cc27f691e99b

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Date deposited: 03 May 2019 16:30
Last modified: 03 May 2019 16:30

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