Abstract
The omnidirectional reflection bands of several typical 2-D photonic
crystals are presented. Numerical results show that there are omnidirectional
reflection bands in photonic crystals without bandgaps. Furthermore, photonic
crystal waveguides based on omnidirectional reflection bands can be constructed
by using photonic crystals without bandgaps. Like conventional photonic crystal
waveguides based on bandgaps, the novel waveguides can also achieve high-efficient
transmission through waveguide bends with near-zero radii of curvature. This
waveguide is expected to be applied to highly dense photonic integrated circuits
after further research. The aforementioned results are helpful to widen the
research field of photonic crystal waveguides.
© 2011 IEEE
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