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

Chalmers University of Technology

CIC nanoGUNE

K. Fleischer

Trinity College Dublin

Mikael Svedendahl

Chalmers, Fysik, Bionanofotonik

Nils Odebo Länk

Chalmers, Fysik, Bionanofotonik

Alexander Dmitriev

Chalmers, Fysik, Bionanofotonik

Paolo Vavassori

Basque Foundation for Science (Ikerbasque)

CIC nanoGUNE

I. V. Shvets

Trinity College Dublin

Mikael Käll

Chalmers, Fysik, Bionanofotonik

Nanoscale

2040-3364 (ISSN)

Vol. 8 10576-10581

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1039/c6nr01336h