Article (Scientific journals)
Plasmonic zero mode waveguide for highly confined and enhanced fluorescence emission
Ponzellini, Paolo; Zambrana-Puyalto, Xavier; Maccaferri, Nicolò et al.
2018In Nanoscale, 10 (36), p. 17362-17369
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Abstract :
[en] We fabricate a plasmonic nanoslot that is capable of performing enhanced single molecule detection at 10 muM concentrations. The nanoslot combines the tiny detection volume of a zero-mode waveguide and the field enhancement of a plasmonic nanohole. The nanoslot is fabricated on a bi-metallic film formed by the sequential deposition of gold and aluminum on a transparent substrate. Simulations of the structure yield an average near-field intensity enhancement of two orders of magnitude at its resonant frequency. Experimentally, we measure the fluorescence stemming from the nanoslot and compare it with that of a standard aluminum zero-mode waveguide. We also compare the detection volume for both structures. We observe that while both structures have a similar detection volume, the nanoslot yields a 25-fold fluorescence enhancement.
Disciplines :
Physics
Author, co-author :
Ponzellini, Paolo
Zambrana-Puyalto, Xavier
Maccaferri, Nicolò ;  Istituto Italiano di Tecnologia
Lanzano, Luca
De Angelis, Francesco
Garoli, Denis
External co-authors :
yes
Language :
English
Title :
Plasmonic zero mode waveguide for highly confined and enhanced fluorescence emission
Publication date :
2018
Journal title :
Nanoscale
ISSN :
2040-3372
Publisher :
Royal Society of Chemistry, United Kingdom
Volume :
10
Issue :
36
Pages :
17362-17369
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 687089 - PROSEQO - PROtein SEQuencing using Optical single molecule real-time detection
Funders :
CE - Commission Européenne [BE]
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since 22 February 2019

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