Abstract
In this paper, a theoretical study of the optical performance of the
parallel-plate waveguide, the nonradiative dielectric (NRD) waveguide, and a
recently proposed metallo–dielectric waveguide (MDW) [Buckley and
Berini, Optics Letters, vol. 34, no. 2, pp.
223–225, 2009] is reported. One-dimensional analysis is used to
gain insight into their operation, followed by full-wave 2-D simulations of
the waveguides in their straight and curved form. The modes supported by the
NRD waveguide are perturbed by the excitation of surface plasmon polaritons
(SPPs) along the metal surfaces causing high propagation loss for the
straight waveguide and mode deformation along radial bends, as $r_0 \rightarrow 0$. In contrast the recently proposed MDW shows promise due to its
ability to guide the fundamental TE mode over long-range ($\sim$1.2 dB/mm) and through aggressive bends with low loss while
retaining its mode character. The waveguide also has potential use in
optoelectronic/electrooptic components due to the presence of the metal
plates.
© 2009 IEEE
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