Modelling of Polarization-Dependent Loss in Plasmonic Nanowire Waveguides
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- Rosenzveig, T., Hermannsson, P.G. & Leosson, K. Plasmonics (2010) 5: 75. doi:10.1007/s11468-009-9118-y
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We have investigated the potential of using gold nanowires embedded in a dielectric cladding environment as polarization-independent long-range surface plasmon polariton waveguides at telecom wavelengths. We performed finite-element analysis on various symmetric and close-to-symmetric cross-sectional geometries and evaluated the effects of cladding thickness on the propagation and coupling loss. The calculations confirm that fabrication of polarization-independent waveguides with reasonable tolerances is feasible and that straight-waveguide insertion losses around 1.5 dB for short (0.5 mm) devices can be realized when coupling to and from conventional dielectric waveguide geometries.