Journal
OPTICS EXPRESS
Volume 17, Issue 21, Pages 19225-19234Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.019225
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We propose an ultra-small polarization splitter based on a resonant tunneling phenomenon. This polarization splitter consists of two identical horizontally oblong silicon wire waveguides separated by a vertical slot waveguide. The structural parameters of the central resonant slot waveguide are designed to couple only the TM-like mode between the left and right side silicon wire waveguides. Results from numerical simulation with the full-vectorial beam propagation method show that a 16-mu m-long polarization splitter with extinction ratio better than - 20 dB on the entire C-band is achieved. (C) 2009 Optical Society of America
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