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Slot and Layer-Slot Waveguide in the Visible Spectrum

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2 Author(s)
Genni Testa ; Ist. per il Rilevamento Elettromagnetico dell'Ambiente (IREA), Italian Nat. Res. Council (CNR), Naples, Italy ; Romeo Bernini

Slot waveguides based on TiO2 nanowires are numerically analyzed in the visible spectrum. The modal properties and the sensing capabilities of a conventional slot waveguide are investigated at an operating wavelength of 635 nm. Furthermore, a novel slot waveguide configuration called Layer-slot (L-slot) is proposed and discussed. The numerical results show that L-slot waveguides permit to achieve field confinement and sensing properties with values comparable with conventional slot waveguide, but with a strongly simplified fabrication process.

Published in:

Journal of Lightwave Technology  (Volume:29 ,  Issue: 19 )