We report on the enhancement of surface plasmon resonances in a holey bidimensional grating of subwavelength size, drilled in a gold thin film coated by a graphene sheet. The enhancement originates from the coupling between charge carriers in graphene and gold surface plasmons. The main plasmon resonance peak is located around 1.5 microns. A lower constraint on the gold-induced doping concentration of graphene is specified and the interest of this architecture for molecular sensing is also highlighted.
@article{arxiv.1304.3291,
title = {Graphene-coated holey metal films: tunable molecular sensing by surface plasmon resonance},
author = {Nicolas Reckinger and Alexandru Vlad and Sorin Melinte and Jean-Francois Colomer and Michael Sarrazin},
journal= {arXiv preprint arXiv:1304.3291},
year = {2013}
}
Comments
5 pages, 4 figures, Final version. Published in Applied Physics Letters