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

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 fil...

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Bibliographic Details
Published in:Optics letters 2014-09, Vol.39 (17), p.4994-4997
Main Authors: Balci, Sinan, Karademir, Ertugrul, Kocabas, Coskun, Aydinli, Atilla
Format: Article
Language:English
Subjects:
Coupling (molecular)
Dyes
Hybrid structures
Joining
Nanostructure
Quenching (cooling)
Reflection
Spectroscopy
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.004994