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- W2327746615 abstract "Plasmonically active SERS substrates, such as metallic gratings or MetaMaterials like Split Ring Resonators, have sub-wavelength features that enable direct coupling of normally incident electromagnetic radiation to surface plasmons. The high detection sensitivity of these methods exploits the EM field enhancements which arise in the proximity of the metallic nanostructures.The object of the PhD research is the design, fabrication and characterization of plasmonic nanostructures to be used as biosensors.In order to fabricate SERS-active substrates suitable for sensing applications, a well-tested nanofabrication process for the realization of easily manufacturable and reproducible devices has been developed, exploring the different mechanisms of light transmission through 1D digital metallic gratings in order to optimize the optical response and efficiency of the devices.1D digital gold grating devices, able to concentrate the electromagnetic radiation inside the slits, have been fabricated. The SERS Enhancement Factor of the realized nanostructures and its dependence on a generic hybrid polarization have been measured and compared with the theoretical estimations.A good agreement between the experimental and numerical estimations, added up to a well-tested nanofabrication process able to guarantee a good uniformity and reproducibility of the device, has confirmed the potentiality of the nanofabrication technique in substrate engineering to provide local fields of the desired intensity and location.Finally, novel types of sensing nanodevices, coupling biosensing to MetaMaterials properties have been realized, to explore the peculiar properties of such kind of structures in combination with plasmonic nano-optics.These type of sensors would likelihood represent a promising step toward future reproducible single-molecule detection using engineered plasmonic substrates" @default.
- W2327746615 created "2016-06-24" @default.
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- W2327746615 date "2012-01-29" @default.
- W2327746615 modified "2023-09-26" @default.
- W2327746615 title "Design of nanodevices for sensing applications" @default.
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