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The world's most sensitive plasmon resonance sensor inspired by ancient Roman cup
Date:2/14/2013

ween the holes. In addition, most of the previous studies are concerned with straight holes only. Here, the EOT is mediated mainly by SPPs, which limits the sensitivity and figure of merits obtainable from such devices.

"Our current design employs 3D sub-wavelength tapered periodic hole array plasmonic structure. In contrast to the SPP mediated EOT, the proposed structure relies on Localized Surface Plasmon (LSP) mediated EOT," Gartia said. "The advantage of LSPs is that the enhanced transmission at different wavelengths and with different dispersion properties can be tuned by controlling the size, shape, and materials of the 3D holes. The tapered geometry will funnel and adiabatically focus the photons on to the sub-wavelength plasmonic structure at the bottom, leading to large local electric field and enhancement of EOT.

"Secondly the localized resonance supported by 3D plasmonic structure will enable broadband tuning of optical transmission through controlling the shape, size, and period of holes as well as the shape, size, and period of metallic particles decorated at the side walls. In other words, we will have more controllability over tuning the resonance wavelengths of the sensor."


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Contact: Logan Liu
loganliu@illinois.edu
217-244-4349
University of Illinois College of Engineering
Source:Eurekalert  

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