Twenty-fold enhancement of molecular fluorescence by coupling to a J-aggregate critically coupled resonator

Publication Type:

Journal Article

Source:

ACS Nano, ACS Publications, Volume 6, Issue 1, p.467-471 (2012)

ISBN:

1936-0851

Keywords:

2012, 2013 and earlier

Abstract:

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.

Notes:

PMID: 22122758