Háskólinn í ReykjavíkReykjavik UniversityCarney, DanielSvavarsson, HalldorHemmati, HafezFannin, AlexanderYoon, JaeMagnusson, Robert2020-09-292020-09-292019-02-21Carney, D. J., Svavarsson, H. G., Hemmati, H., Fannin, A., Yoon, J. W., & Magnusson, R. (2019). Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions. Sensors, 19(4), 897. https://doi.org/10.3390/s190408971424-8220https://hdl.handle.net/20.500.11815/2081Publisher's version.(útgefin grein)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.897eninfo:eu-repo/semantics/openAccessElectrical and Electronic EngineeringAnalytical ChemistryAtomic and Molecular Physics, and OpticsBiochemistryRefractometerPlasmonic sensorsBiosensorsNanocupsPeriodic structuresSurface plasmon resonanceGas detectorsSensorsRafmagnsverkfræðiRafeindaverkfræðiEfnafræðiAtómfræðiSameindafræðiLífefnafræðiRafgasLitrófsgreiningNanótækniinfo:eu-repo/semantics/article10.3390/s19040897