Optical transmission properties of C-shaped subwavelength waveguides on silicon

Lopatiuk-Tirpak, O.; Ma, J.; Fathpour, S.
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p241109
Academic Journal
Optical properties of C-shaped subwavelength waveguides in metallic (silver) films on silicon substrates are studied in the range of 0.6–6 μm. Power throughput and resonant wavelengths of several transmission modes are studied by varying the waveguide length (or metal thickness). Among three types of transmission modes, the fundamental order of the Fabry–Perot-type mode was shown to attain remarkably high power throughputs (as high as 12). With optimized design of the aperture, the resonant wavelength of this mode occurs in the 1–2 μm wavelength range, suggesting that such apertures can be utilized to achieve plasmonic-enhanced silicon photonic devices at telecommunication wavelengths.


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