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Manipulating light absorption in dye-doped dielectric films on reflecting surfaces
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO. Zhejiang University, China.
2014 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 22, no 21, p. 25965-25975Article in journal (Refereed) Published
Abstract [en]

We experimentally and numerically developed a tunable absorbing nanoscale thin-film system, comprising of dye molecules doped dielectric coatings on reflecting surfaces, the absorption behaviors of which can be flexibly tuned by adjusting the system parameters, i.e. the coating thickness and the doping concentration of dye molecules. Specifically, with appropriate system parameters, our absorbing thin-film system exhibits very directional and polarization dependent absorption properties, which can be significantly altered if applied with different parameters. Calculations demonstrate the unique absorption behaviors are a result of coupling between molecular absorption and Fabry-Perot resonances in the thin-film cavity. In addition, we theoretically show that both the spectral and directional range of the absorption in the thin-film system can be intentionally regulated by doping dyes with different absorption band and setting proper excitation conditions of Fabry-Perot resonances.

Place, publisher, year, edition, pages
2014. Vol. 22, no 21, p. 25965-25975
Keywords [en]
Photonic Heterocrystals, Coatings, Metals, Nanostructures, Fluorescence, Enhancement, Emission
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-157001DOI: 10.1364/OE.22.025965ISI: 000344004600134PubMedID: 25401630Scopus ID: 2-s2.0-84908181048OAI: oai:DiVA.org:kth-157001DiVA, id: diva2:769049
Funder
Swedish Foundation for Strategic Research Swedish Research Council
Note

QC 20141205

Available from: 2014-12-05 Created: 2014-12-04 Last updated: 2017-12-05Bibliographically approved

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