Triangular metal wedges for subwavelength plasmon-polariton guiding at telecom wavelengths

Alexandra Boltasseva, V.S. Volkov, Rasmus Bundgaard Nielsen, E. Moreno, S.G. Rodrigo, S.I. Bozhevolnyi

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report on subwavelength plasmon-polariton guiding by triangular metal wedges at telecom wavelengths. A high-quality fabrication procedure for making gold wedge waveguides, which is also mass- production compatible offering large-scale parallel fabrication of plasmonic components, is developed. Using scanning near-field optical imaging at the wavelengths in the range of 1.43 - 1.52 µm, we demonstrate low-loss (propagation length ~ 120 µm) and well-confined (mode width ≅ 1.3 µm) wedge plasmon-polariton guiding along triangular 6-µm-high and 70.5°- angle gold wedges. Experimental observations are consistent with numerical simulations performed with the multiple multipole and finite difference time domain methods.
Original languageEnglish
JournalOptics Express
Volume16
Issue number8
Pages (from-to)5252-5260
ISSN1094-4087
DOIs
Publication statusPublished - 2008

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