Article (Scientific journals)
Polarization conversion-based molecular sensing using anisotropic plasmonic metasurfaces
Verre, Ruggero; Maccaferri, Nicolò; Fleischer, Karsten et al.
2016In Nanoscale, 8 (20), p. 10576-10581
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Abstract :
[en] Anisotropic media induce changes in the polarization state of transmitted and reflected light. Here we combine this effect with the refractive index sensitivity typical of plasmonic nanoparticles to experimentally demonstrate self-referenced single wavelength refractometric sensing based on polarization conversion. We fabricated anisotropic plasmonic metasurfaces composed of gold dimers and, as a proof of principle, measured the changes in the rotation of light polarization induced by biomolecular adsorption with a surface sensitivity of 0.2 ng cm−2. We demonstrate the possibility of miniaturized sensing and we show that experimental results can be reproduced by analytical theory. Various ways to increase the sensitivity and applicability of the sensing scheme are discussed.
Disciplines :
Physics
Author, co-author :
Verre, Ruggero
Maccaferri, Nicolò ;  Chalmers University of Technology ; CIC nanoGUNE
Fleischer, Karsten
Svedendahl, Mikael
Odebo Länk, Nils
Dmitriev, Alexandre
Vavassori, Paolo
Shvets, Igor V.
Käll, Mikael
External co-authors :
yes
Language :
English
Title :
Polarization conversion-based molecular sensing using anisotropic plasmonic metasurfaces
Publication date :
2016
Journal title :
Nanoscale
ISSN :
2040-3372
Publisher :
Royal Society of Chemistry, Cambridge, United Kingdom
Volume :
8
Issue :
20
Pages :
10576-10581
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 22 February 2019

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