期刊
ACS NANO
卷 6, 期 1, 页码 467-471出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn203789t
关键词
fluorescence enhancement; J-aggregates; resonator; FRET; plasmonics; organic optoelectronics
类别
资金
- Department of Energy
- Energy Frontiers Research Center for Excitonics
- Institute for Soldier Nanotechnology
- National Science Foundation
- Hertz Foundation
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.
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