Twenty-Fold Enhancement of Molecular Fluorescence by Coupling to a J-Aggregate Critically Coupled Resonator
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- 作者：Gleb M. Akselrod ; Brian J. Walker ; William A. Tisdale ; Moungi G. Bawendi ; Vladimir Bulovic
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：January 24, 2012
- 年：2012
- 卷：6
- 期：1
- 页码：467-471
- 全文大小：786K
- 年卷期：v.6,no.1(January 24, 2012)
- ISSN：1936-086X
文摘
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.