Affiliation:
1. Laser Processes and Plasmonics Laboratory, Engineering Physics Department, Polytechnique Montreal, 2900 Edouard Montpetit Blvd, Montreal H3T1J4, Canada
Abstract
AbstractIn this article, we present a multiperiodic nanohole array structure for improved sensing. The structure consists a series of rows of nanoholes, each having a different period in an ascending order. A monochromatic source illuminates the structure, and a resonance condition is met for the row having a momentum matching Bloch wave, which leads to extraordinary optical transmission. With this new plasmonic structure, the sensing signal can be retrieved using the spatial position of the transmission maxima. This setup requires a simple optical setup while achieving increased resolution and accuracy. A resolution of 4.6×10−6 refractive index units is achieved, which is comparable to surface plasmon resonance system based on the Kretchmann configuration.
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
Cited by
13 articles.
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