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

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. Usi...

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Bibliographic Details
Published in:Optics express 2008-04, Vol.16 (8), p.5252-5260
Main Authors: Boltasseva, Alexandra, Volkov, Valentyn S, Nielsen, Rasmus B, Moreno, Esteban, Rodrigo, Sergio G, Bozhevolnyi, Sergey I
Format: Article
Language:English
Subjects:
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Gold - chemistry
Models, Theoretical
Surface Plasmon Resonance - instrumentation
Surface Plasmon Resonance - methods
Telecommunications - instrumentation
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Summary: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 microm, we demonstrate low-loss (propagation length approximately 120 microm) and well-confined (mode width congruent with 1.3 microm) wedge plasmon-polariton guiding along triangular 6-microm-high and 70.5 degree-angle gold wedges. Experimental observations are consistent with numerical simulations performed with the multiple multipole and finite difference time domain methods.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.16.005252