Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions
1
Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76019, USA
2
School of Science and Engineering, Reykjavik University, 101 Reykjavik, Iceland
3
Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(4), 897; https://doi.org/10.3390/s19040897
Received: 16 January 2019
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Revised: 4 February 2019
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Accepted: 18 February 2019
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Published: 21 February 2019
(This article belongs to the Section Biosensors)
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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Keywords:
refractometer; plasmonic sensors; biosensors; nanocups; periodic structures
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MDPI and ACS Style
Carney, D.J.; Svavarsson, H.G.; Hemmati, H.; Fannin, A.; Yoon, J.W.; Magnusson, R. Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions. Sensors 2019, 19, 897. https://doi.org/10.3390/s19040897
AMA Style
Carney DJ, Svavarsson HG, Hemmati H, Fannin A, Yoon JW, Magnusson R. Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions. Sensors. 2019; 19(4):897. https://doi.org/10.3390/s19040897
Chicago/Turabian StyleCarney, Daniel J., Halldor G. Svavarsson, Hafez Hemmati, Alexander Fannin, Jae W. Yoon, and Robert Magnusson. 2019. "Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions" Sensors 19, no. 4: 897. https://doi.org/10.3390/s19040897
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