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Published December 29, 2004 | Published
Book Section - Chapter Open

Plasmonics: metallic nanostructures for energy guiding and sensing

Abstract

We investigate the optical properties of arrays of closely spaced metal nanoparticles in view of their potential to guide electromagnetic energy with a lateral mode confinement below the diffraction limit of light. Finite-difference time-domain simulations of short arrays of noble metal nanospheres show that electromagnetic pulses at optical frequencies can propagate along the arrays due to near-field interactions between plasmon-polariton modes of adjacent nanoparticles. Near-field microscopy enables the study of energy transport in these plasmon waveguides and shows experimental evidence for energy propagation over a distance of 0.5 μm for plasmon waveguides consisting of spheroidal silver particles fabricated using electron beam lithography.

Additional Information

© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was supported by the Air Force Office of Scientific Research and the Center for Science and Engineering of Materials at Caltech (NSF).

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