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

Irene Fernandez-Cuesta, Rasmus B. Nielsen, Alexandra Boltasseva, Xavier Borrise, Francesc Ṕrez-Murano, Anders Kristensen

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


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. © 2009 American Institute of Physics.
Original languageEnglish
Article number203102
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 1 Jan 2009


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