Polarization conversion-based molecular sensing using anisotropic plasmonic metasurfaces
Artikel i vetenskaplig tidskrift, 2016
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.
Författare
Ruggero Verre
Chalmers, Fysik, Bionanofotonik
N. Maccaferri
CIC NanoGUNE
Chalmers University of Technology
K. Fleischer
Trinity College Dublin
Mikael Svedendahl
Chalmers, Fysik, Bionanofotonik
Nils Odebo Länk
Chalmers, Fysik, Bionanofotonik
Alexander Dmitriev
Chalmers, Fysik, Bionanofotonik
Paolo Vavassori
Ikerbasque, the Basque Foundation for Science
CIC NanoGUNE
I. V. Shvets
Trinity College Dublin
Mikael Käll
Chalmers, Fysik, Bionanofotonik
Nanoscale
2040-3364 (ISSN)
Vol. 8 20 10576-10581Ämneskategorier (SSIF 2011)
Atom- och molekylfysik och optik
DOI
10.1039/c6nr01336h