Abstract
Based on a transverse electric (TE)/transverse magnetic (TM) polarization diversity
waveguide, we theoretically propose a TE-pass/TM-stop polarizer by etching a polarization
dependent Bragg grating into the oxide layer of a silicon/thin SiO
$_2$
gap/metal cap hybrid plasmonic waveguide. The simulation results indicate that
the device is characterized by high TE-transmission and large TM-reflection levels in a wide
waveband from 1.48 to 1.7 μm combined with an excellent compactness (length less than 5 μm).
Transmission and reflection extinction ratio are both larger than 17.1 dB in the 1.48–1.64 μm
wavelength range, while losses are smaller than 1.36 and 0.69 dB for the TE and TM modes,
respectively.
© 2014 IEEE
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