Journal article

Modeling of gold circular sub-wavelength apertures on a fiber endface for refractive index sensing?

H Nguyen, GW Baxter, SF Collins, F Sidiroglou, A Roberts, TJ Davis

Photonic Sensors | Published : 2012

Abstract

A finite-difference time-domain approach was used to investigate the excitation of surface plasmons of the circular sub-wavelength apertures on an optical fiber endface. This phenomenon provided the basis of a sensitive liquid refractive index sensor. The proposed sensor is compact and has the potential to be used in biomedical applications, having a sensitivity of (373 plusmn; 16) nm per refractive index unit (RIU) as found through the variation of a reflection minimum with the wavelength. © The Author(s) 2012.

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