Saturated excitation of fluorescence to quantify excitation enhancement in aperture antennas

Fluorescence spectroscopy is widely used to probe the electromagnetic intensity amplification on optical antennas, yet measuring the excitation intensity amplification is a challenge, as the detected fluorescence signal is an intricate combination of excitation and emission. Here, we describe a nove...

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Bibliographic Details
Published inOptics express Vol. 20; no. 16; pp. 18085 - 18090
Main Authors Aouani, Heykel, Hostein, Richard, Mahboub, Oussama, Devaux, Eloïse, Rigneault, Hervé, Ebbesen, Thomas W, Wenger, Jérôme
Format Journal Article
LanguageEnglish
Published United States Optical Society of America - OSA Publishing 30.07.2012
Subjects
Optics
Physics
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Summary:Fluorescence spectroscopy is widely used to probe the electromagnetic intensity amplification on optical antennas, yet measuring the excitation intensity amplification is a challenge, as the detected fluorescence signal is an intricate combination of excitation and emission. Here, we describe a novel approach to quantify the electromagnetic amplification in aperture antennas by taking advantage of the intrinsic non linear properties of the fluorescence process. Experimental measurements of the fundamental f and second harmonic 2f amplitudes of the fluorescence signal upon excitation modulation are used to quantify the electromagnetic intensity amplification with plasmonic aperture antennas.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.018085