Twenty-Fold Enhancement of Molecular Fluorescence by Coupling to a J-Aggregate Critically Coupled Resonator

We report a 20-fold enhancement in the fluorescence of the organic dye DCM when resonantly coupled to a strongly optically absorbing structure of a thin film of spin-deposited molecular J-aggregates in a critically coupled resonator (JCCR) geometry. A submonolayer equivalent of DCM molecules is show...

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Bibliographic Details
Published in:ACS nano 2012-01, Vol.6 (1), p.467-471
Main Authors: Akselrod, Gleb M, Walker, Brian J, Tisdale, William A, Bawendi, Moungi G, Bulovic, Vladimir
Format: Article
Language:English
Subjects:
Coupling (molecular)
Fluorescence
Fluorescent Dyes - chemistry
Focusing
Illumination
Lighting
Molecular structure
Nanostructure
Resonators
Spectrometry, Fluorescence - methods
Thin films
Vibration
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Summary:We report a 20-fold enhancement in the fluorescence of the organic dye DCM when resonantly coupled to a strongly optically absorbing structure of a thin film of spin-deposited molecular J-aggregates in a critically coupled resonator (JCCR) geometry. A submonolayer equivalent of DCM molecules is shown to absorb and re-emit 2.2% of the incident resonant photons when coupled to the JCCR enhancement structure, compared to 0.1% for the bare film of same thickness on quartz. Such a JCCR structure is a general energy focusing platform that localizes over 90% of incident light energy within a 15 nm thin film layer in the form of excitons that can subsequently be transferred to colocated lumophores. Applications of the exciton-mediated concentration of optical energy are discussed in the context of solid-state lighting, photodetection, and single photon optics.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn203789t