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Temperature dependent polariton emission from strongly coupled organic semiconductor microcavities

Ceccarelli, S., Wenus, J., Skolnick, M.S. and Lidzey, D.G. (2007) Temperature dependent polariton emission from strongly coupled organic semiconductor microcavities. Superlattices and Microstructures, 41 (5 - 6). pp. 289-292. ISSN 0749-6036

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Abstract

We investigated the absorption and photoluminescence (PL) of J-aggregates of a cyanine dye both in a thin film format and when used as the active layer in a strongly-coupled microcavity. We show that as temperature is reduced, the absorption linewidth of the J-aggregates narrows and shifts to higher energy. When the J-aggregate is placed in a microcavity we find that the energy of the polariton modes also shifts to higher energies as temperature is reduced. We compare the intensity of PL emission from the upper and lower branches at resonance as a function of temperature, and find that it can be described by an activation energy of 25 meV. PL emission spectra at resonance also suggest that uncoupled excitons inside the microcavity populate the upper polariton branch states.

Item Type: Article
Copyright, Publisher and Additional Information: © 2007 Elsevier B.V. This is an author produced version of a paper published in Superlattices and Microstructures. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Strong coupling, exciton, organic microcavities, J-aggregates, absorbance,photoluminescence, reflectivity, temperature dependence
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User: Sherpa Assistant
Date Deposited: 27 Sep 2007 14:58
Last Modified: 08 Feb 2013 16:54
Published Version: http://dx.doi.org/10.1016/j.spmi.2007.03.003
Status: Published
Publisher: Elsevier Ltd.
Refereed: Yes
Identification Number: 10.1016/j.spmi.2007.03.003
URI: http://eprints.whiterose.ac.uk/id/eprint/3377

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