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Highly efficient and tunable fluorescence of a nanofluorophore in silica/metal dual shells with plasmonic resonance
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2008 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 103, no 2Article in journal (Refereed) Published
Abstract [en]

A dual-shell structure consisting of a silica buffer shell and a metallic outer shell is studied and designed for highly efficient and tunable fluorescence. The enhanced Purcell effect due to the plasmonic resonance and the dependence of the resonance on the structural parameters are analyzed and discussed through a classical electromagnetic approach. With the present dual-shell structure a fivefold enhancement of the fluorescence efficiency can be achieved for a nanofluorophore comprised of multiple tetramethylrhodamine isothiocyanate dye molecules, as compared to the nanofluorophore within a single silica shell. Furthermore, the peak wavelength of the fluorescence spectrum can be tuned easily (due to the variation of the surface plasmon resonance) by over 50 nm when the refractive index of the ambient material varies from 1.3 to 1.6.

Place, publisher, year, edition, pages
2008. Vol. 103, no 2
Keyword [en]
spontaneous-emission, nanoparticles, emitters, spectra
Identifiers
URN: urn:nbn:se:kth:diva-17287DOI: 10.1063/1.2830986ISI: 000252821100077OAI: oai:DiVA.org:kth-17287DiVA: diva2:335330
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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He, Sailing

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