A broadband plasmonic enhanced transparent conductor

Abstract

We have designed a high performance transparent conductor using silver and aluminium stacked films perforated with hexagonally periodic subwavelength holes which are close to the lattice period. A broadband (λ of 400–800 nm) enhanced transmission is achieved by strong coupling of surface plasmons and propagating modes through the holes. Optical and electrical modeling predict a good combination of transparency and sheet resistance (e.g. ∼85% T and ∼2.4 Ω sq⁻¹). Preliminary characterization results of the samples made via nanosphere lithography will also be presented.