Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array

Francesco Floris; Margherita Angelini; Eliana Manobianco; Paola Pellacani; Valentina Tolardo; Franco Marabelli

doi:10.20944/preprints202403.1082.v1

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preprints.org > physical sciences > optics and photonics > doi: 10.20944/preprints202403.1082.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array

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Version 1 : Received: 18 March 2024 / Approved: 18 March 2024 / Online: 19 March 2024 (14:35:44 CET)

A peer-reviewed article of this Preprint also exists.

Floris, F.; Angelini, M.; Manobianco, E.; Pellacani, P.; Tolardo, V.; Marabelli, F. Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array. Appl. Sci. 2024, 14, 3574. Floris, F.; Angelini, M.; Manobianco, E.; Pellacani, P.; Tolardo, V.; Marabelli, F. Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array. Appl. Sci. 2024, 14, 3574.

Abstract

Gold nanohole arrays are periodic metastructures gathering huge interest for biosensing applica-tions. The grating-like structure defines their plasmonic mode features and their angular disper-sion can be used to highlight efficiently their interaction with the fluorescence emission of a properly tuned fluorophore. Resorting to a properly tuned/engineered/optimised plasmonic na-nohole array and a commercial organic dye, we performed an accurate resolved angle-resolved optical characterization. The plasmonic fingerprints was consequently identified as a modification of the dye photoluminescence signal in terms of both spectral redistribution and enhancement. Interestingly, by analyzing the results, an advantageous measurement configuration can be iden-tified to better engineer a suitable platform for efficiency maximization in plasmon-enhanced flu-orescence-based applications. Therefore, the coupling mechanism with the plasmonic modes, and nanostructure properties can be carefully co-optimized.

Keywords

organic dye; plasmon enhanced fluorescence; angular dispersion spectroscopy

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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