Abstract
Longitudinal 2 x 2 thermo-optic switches based on dielectric-loaded plasmonic
circuitry are thoroughly studied using vectorial numerical tools, i.e., an
eigenmode solver and a beam propagation method, implemented with the
finite-element technique. The switching configurations studied are based on
the Mach–Zehnder interferometer (MZI) and a novel multimode
interference (MMI) design. Both components offer improved performance, with
respect to comparable microring-based ones, exhibiting larger bandwidth and
output port extinction ratio, allowing values up to 30 dB. The reference MZI
configuration has better overall performance when compared to the MMI,
mainly in terms of available bandwidth.
© 2011 IEEE
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