Tetz Kevin A, Pang Lin, Fainman Yeshaiahu
Department of Electrical and Computer Engineering, University of California, San Diego 92093, USA.
Opt Lett. 2006 May 15;31(10):1528-30. doi: 10.1364/ol.31.001528.
A high spectral resolution, 2D nanohole-array-based surface plasmon resonance sensor that operates at normal or near normal incidence--facilitating high spatial resolution imaging--is presented. The angular and spectral transmittance of the structure is modified from a Fano type to a pure Lorentzian line shape with a parallel and orthogonal polarizer-analyzer pair. This change leads to a linewidth narrowing that maximizes the sensor resolution, which we show to be of O(10(-5)) refractive index units (RIU). We estimate the potential of this system of O(10(-6)) RIU under optimal conditions.
