Absorption enhancement of molecules in the weak plasmon-exciton coupling regime

Date
2014
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Source Title
Optics Letters
Print ISSN
0146-9592
Electronic ISSN
1539-4794
Publisher
Optical Society of American (OSA)
Volume
39
Issue
17
Pages
4994 - 4997
Language
English
Type
Article
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Abstract

We report on the experimental and theoretical investigations of enhancing the optical absorption of organic molecules in the weak plasmon-exciton coupling regime. A metal-organic hybrid structure consisting of dye molecules embedded in the polymer matrix is placed in close vicinity to thin metal films. We have observed a transition from a weak coupling regime to a strong coupling one as the thickness of the metal layer increases. The results indicate that absorption of the self-assembled J-aggregate nanostructures can be increased in the weak plasmon-exciton coupling regime and strongly quenched in the strong coupling regime. A theoretical model based on the transfer-matrix method qualitatively confirms the experimental results obtained from polarization-dependent spectroscopic reflection measurements.

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Keywords
Excitons, Molecules, Plasmons, Electromagnetic wave absorption, Excitons, Light absorption, Molecules, Organometallics, Plasmons, Polymer films, Absorption enhancement, Metal-organic hybrids, Organic molecules, Reflection measurements, Strong-coupling regime, Theoretical investigations, Theoretical modeling, Weak-coupling regime, Transfer matrix method, Transfer matrix method
Citation
Published Version (Please cite this version)