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Article Dans Une Revue Optics Letters Année : 2009

Wavelength-selective directional coupling with dielectric-loaded plasmonic waveguides

Résumé

We consider wavelength-selective splitting of radiation using directional couplers (DCs) formed by dielectric-loaded surface-plasmon-polariton waveguides (DLSPPWs). The DCs were fabricated by depositing subwavelength-sized polymer ridges on a gold film using large-scale UV photolithography and characterized at telecommunications wavelengths with near-field microscopy. We demonstrate a DLSPPW-based 45-mu m-long DC comprising 3 mu m offset S bends and 25-mu m-long parallel waveguides that changes from the "through" state at 1500 nm to 3 dB splitting at 1600 nm, and show that a 50.5-mu m-long DC should enable complete separation of the radiation channels at 1400 and 1620 nm. The DC performance is found to be in good agreement with full vectorial three-dimensional finite-element simulations. (C) 2009 Optical Society of America
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Dates et versions

hal-00472365 , version 1 (11-04-2010)

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Z. Chen, Tobias Holmgaard, S. I. Bozhevolnyi, Alexey V. Krasavin, Anatoly V. Zayats, et al.. Wavelength-selective directional coupling with dielectric-loaded plasmonic waveguides. Optics Letters, 2009, 34 (3), pp.310-312. ⟨10.1364/OL.34.000310⟩. ⟨hal-00472365⟩
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