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Phonon-driven resonantly-enhanced polariton luminescence in organic microcavities

Phonon-driven resonantly-enhanced polariton luminescence in organic microcavities
Phonon-driven resonantly-enhanced polariton luminescence in organic microcavities
Characteristic low-threshold polariton lasing of organic and inorganic microcavity systems can only be achieved with efficient population of the lower polariton ground state. In this regard, the key role undertaken by vibronic replicas and molecular phonon it has been shown experimentally and theoretically predicted by various works. We report here, direct observation of critical enhancement of polariton population density in strongly coupled J-aggregate based organic microcavities. The process highlighted in our study is manifested by discrete maxima of the angular-resolved photoluminescence intensity and interpreted by the mediation of molecular vibrations quanta characteristic of the active material. By measuring the reduced time scale of vibrations driven relaxation dynamics, manifested by sub 100fs buildup times, we emphasized the efficiency of the mechanism to overcome losses channel in disordered J-aggregate systems. Hence, the realization of amplified polariton population with improved relaxation rates paves the way for the observation of low threshold lasing, primary step for developing room temperature organic laser sources and ultra-fast optoelectronic devices with less fabrication complexity than their crystalline counterparts.
polariton laser, organic microcavities, molecular phonons, J-aggregates, ultra-fast builds up population
0277-786X
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. (2012) Phonon-driven resonantly-enhanced polariton luminescence in organic microcavities. Proceedings of SPIE, 8260. (doi:10.1117/12.906680).

Record type: Article

Abstract

Characteristic low-threshold polariton lasing of organic and inorganic microcavity systems can only be achieved with efficient population of the lower polariton ground state. In this regard, the key role undertaken by vibronic replicas and molecular phonon it has been shown experimentally and theoretically predicted by various works. We report here, direct observation of critical enhancement of polariton population density in strongly coupled J-aggregate based organic microcavities. The process highlighted in our study is manifested by discrete maxima of the angular-resolved photoluminescence intensity and interpreted by the mediation of molecular vibrations quanta characteristic of the active material. By measuring the reduced time scale of vibrations driven relaxation dynamics, manifested by sub 100fs buildup times, we emphasized the efficiency of the mechanism to overcome losses channel in disordered J-aggregate systems. Hence, the realization of amplified polariton population with improved relaxation rates paves the way for the observation of low threshold lasing, primary step for developing room temperature organic laser sources and ultra-fast optoelectronic devices with less fabrication complexity than their crystalline counterparts.

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More information

Published date: 2012
Keywords: polariton laser, organic microcavities, molecular phonons, J-aggregates, ultra-fast builds up population

Identifiers

Local EPrints ID: 430541
URI: http://eprints.soton.ac.uk/id/eprint/430541
ISSN: 0277-786X
PURE UUID: e763b832-d8d9-4e97-9f6b-634702e4525f

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

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