Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4718764
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- Army Research Office [W911NF-11-1-0284-1490-AM-01]
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We experimentally demonstrate the color tuning abilities of two-dimensional periodic arrays of gold nano-patches on silicon substrate. We observe that changes in the geometrical parameters of the array can shift significantly the plasmonic resonance that occurs at the edge of the plasmonic band gap. Experimental proof of this shift is provided by the observation of an important change in the color of the diffracted field. Calculations of the diffracted spectra match the observed color changes very well and provide an efficient means for the design of sensing platforms based on color observation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718764]
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