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Compact Polarization Rotator Based on Surface Plasmon Polariton With Low Insertion Loss

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3 Author(s)
Komatsu, M. ; Grad. Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo, Japan ; Saitoh, K. ; Koshiba, M.

An ultracompact mode-evolution-based polarization rotator is proposed. The polarization rotator consists of silicon wire waveguide covered by silica buffer layer and linearly tapered thin aluminum. Numerical simulations using 3-D finite element method demonstrate that it is possible to obtain an 11-μm-long polarization rotator with about -20-dB extinction ratio and less than 4.7-dB loss in C-band for both polarization conversions from TM-like mode to TE-like mode and from TE-like mode to TM-like mode.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 3 )