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

被引：26

作者：

Akselrod, Gleb M. ^{[1
]}

Walker, Brian J. ^{[2
]}

Tisdale, William A. ^{[3
]}

Bawendi, Moungi G. ^{[2
]}

Bulovic, Vladimir ^{[3
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

ACS NANO | 2012年 / 6卷 / 01期

基金：

美国国家科学基金会;

关键词：

fluorescence enhancement; J-aggregates; resonator; FRET; plasmonics; organic optoelectronics;

D O I：

10.1021/nn203789t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：467 / 471

页数：5

共 19 条

[1] Enhancement and quenching of single-molecule fluorescence [J].