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Control of fluorescence enhancement and directionality upon excitations in a thin-film system
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO. Zhejiang University, China.
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2015 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 252, no 10, 2222-2229 p.Article in journal (Refereed) Published
Abstract [en]

Nanostructures with various configurations have been extensively used to engineer the emission properties of embedded fluorophores, but lack the flexibility to dynamically control fluorescence. Here we report a thin-film cavity system, comprising a quarter wavelength thick dye-doped dielectric coating on a reflecting surface, in which the fluorescence enhancement and directionality can be significantly modified by altering the illumination angle. The configuration of the cavity yields absorption properties that are highly dependent on illumination angles, due to the coupling between molecular absorption and Fabry-Perot resonances. Therefore the fluorescence intensity relating to the angle-dependent absorbing efficiency varies with illumination angles. In addition, as a result of synergy between intrinsic absorption of the reflecting surface, Fabry-Perot and surface-plasmon-polariton resonances and illumination-angle dependent excitation efficiencies for differently located molecules, the global emission intensity, including emission from dyes at all locations, can be directionally redistributed by altering the illumination angle.

Place, publisher, year, edition, pages
[Chen, Xingxing; Qiu, Min] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Dept Opt Engn, Hangzhou 310027, Zhejiang, Peoples R China. [Chen, Yu-Hui; Blaikie, Richard J.; Ding, Boyang] Univ Otago, Dept Phys, MacDiarmid Inst Adv Mat & Nanotechnol, Dunedin 9016, New Zealand. [Qiu, Min] Royal Inst Technol, Sch Informat & Commun Technol, S-16440 Kista, Sweden., 2015. Vol. 252, no 10, 2222-2229 p.
Keyword [en]
dynamic manipulation, Fabry-Perot resonances, fluorescence, surface plasmon polaritons, thin films
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-176359DOI: 10.1002/pssb.201552155ISI: 000362722300011ScopusID: 2-s2.0-84943200933OAI: diva2:867870

QC 20151106

Available from: 2015-11-06 Created: 2015-11-03 Last updated: 2015-11-06Bibliographically approved

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