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Field Computations of Optical Antennas

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Abstract:

Antenna-based near-field optical microscopy and spectroscopy makes use of locally enhanced optical fields created near laser-irradiated metal nanostructures acting as local probes. Using three-dimensional simulations based on the finite element method we study the electromagnetic fields near various optical antennas and we optimize their geometry in order to bring out a strong enhancement in a selected frequency range. Our results provide clear guidelines for the fabrication of efficient antenna structures and for improving the sensitivity of current near-field microscopy schemes.

Keywords: NANOPARTICLES; NANORODS; NEAR-FIELD OPTICAL MICROSCOPY; OPTICAL ANTENNAS; PLASMONICS; SURFACE ENHANCED SPECTROSCOPY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2007.033

Publication date: May 1, 2007

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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