Excitation of fluorescent nanoparticles by channel plasmon polaritons propagating in V-grooves

Irene Fernandez Cuesta, Rasmus Bundgaard Nielsen, Alexandra Boltasseva, X. Borrise, F. Perez-Murano, Anders Kristensen

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    Recently, it has been proven that light can be squeezed into metallic channels with subwavelength lateral dimensions. Here, we present the study of the propagation of channel plasmon polaritons confined in gold V-grooves, filled with fluorescent particles. In this way, channel plasmon polaritons propagating in nonempty V-grooves can be characterized, as the propagation track can be directly visualized in the microscope. We have found that beads with subwavelength diameters act as frequency converters for the propagating channel modes, resulting in larger propagation lengths. For micrometric-diameter beads, we show the possibility of individual excitation, what may have applications to develop very sensitive biosensors.
    Original languageEnglish
    JournalApplied Physics Letters
    Issue number20
    Pages (from-to)203102
    Publication statusPublished - 2009

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    Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.


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