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Updated: Jan 28, 2026

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography
Published on: September 2, 2017
Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions
Daniel J Carney1, Halldor G Svavarsson2, Hafez Hemmati3
1Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA. daniel.carney@mavs.uta.edu.
Abstract:
Fabrication and sensor application of a simple plasmonic structure is described in this paper. The sensor element consists of nano-patterned gold film brought about from two-dimensional periodic photoresist templates created by holographic laser interference lithography. Reflectance spectroscopy revealed that the sensor exhibits significant refractive index sensitivity. A linear relationship between shifts in plasmonic resonances and changes in the refractive index were demonstrated. The sensor has a bulk sensitivity (SB) of 880 nm/refractive index unit and work under normal incidence conditions. This sensitivity exceeded that of many common types of plasmonic sensors with more intricate structures. A modeled spectral response was used to study the effect of its geometrical dimensions on plasmonic behavior. A qualitative agreement between the experimental spectra and modeled ones was obtained.
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