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Strong exciton–photon coupling in anthradithiophene microcavities: from isolated molecules to aggregates

Published online by Cambridge University Press:  05 August 2019

J. D. B. Van Schenck ,
E. K. Tanyi ,
L.-J. Cheng ,
J. Anthony  and
O. Ostroverkhova Open the ORCID record for O. Ostroverkhova [Opens in a new window]
J. D. B. Van Schenck
Affiliation:
Department of Physics, Oregon State University, Corvallis, OR 97331, USA
E. K. Tanyi
Affiliation:
Department of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
L.-J. Cheng
Affiliation:
Department of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
J. Anthony
Affiliation:
Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
O. Ostroverkhova*
Affiliation:
Department of Physics, Oregon State University, Corvallis, OR 97331, USA
*
Address all correspondence to O. Ostroverkhova at oksana@science.oregonstate.edu
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Abstract

The authors report on strong exciton–photon coupling in all-metal microcavities containing functionalized anthradithiophene (ADT) in host poly(methyl methacrylate) matrices for a wide range of ADT concentrations. Angle-resolved reflectance of polycrystalline films revealed Rabi splittings up to 340 meV. Angle-resolved photoluminescence in films with low ADT concentrations (dominated by “isolated” ADT molecules) showed Rabi splittings which scaled with the square root of oscillator strength. When “aggregated” and “isolated” ADT molecules coexisted in film, cavities preferentially coupled to “isolated” molecules due to an anisotropic distribution of aggregates. As a solution-processable high-performance organic semiconductor, ADT shows promise as an (opto)electronic polaritonic material.

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Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 3 , September 2019 , pp. 956 - 963
Copyright
Copyright © The Author(s) 2019 

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