Publications (2)14.62 Total impact
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Article: High aspect ratio plasmonic nanostructures for sensing applications.
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ABSTRACT: We present an experimental and theoretical study of plasmonic modes in high aspect ratio nanostructures in the visible wavelength region and demonstrate their high performance for sensing applications. Ordered and well-defined plasmonic structures with various cross-sectional profiles and heights are obtained using a top-down fabrication process. We show that, compared to cylindrical nanorods, structures with split-ring resonator-like cross sections have great potential for powerful sensing due to a pronounced polarization dependence, strong field enhancement, structural tunability, and improved mechanical stability. The plasmonic structures under study exhibit high sensitivities, up to nearly 600 nm/RIU, and figures of merit above 20.ACS Nano 08/2011; 5(8):6374-82. · 10.77 Impact Factor -
Article: High-throughput fabrication of nanoantennae over large areas for biosensing and nanospectroscopy
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ABSTRACT: We report on a simple and high-throughput method for the fabrication of gold and silver nanoparticle dimers with extremely small gaps and extending over large areas, using colloidal lithography and shadow thermal-evaporation techniques. The plasmon resonances of the individual dimers with various structural parameters were studied, as well as their coupling phenomena in the nearly touching regime. The method presented enables fabrication of efficient and low-cost plasmonics structures for applications such as surface-enhanced Raman scattering, plasmon-enhanced fluorescence, and biosensing.Applied Physics Letters 12/2009; 95(23):231903-231903-3. · 3.84 Impact Factor
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Top Journals
- Applied Physics Letters (1)
- ACS Nano (1)
Institutions
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2009
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ETH Zurich
- Metal Physics and Technology Group
Zürich, ZH, Switzerland
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