Abstract
Applicability of the angular properties of scatter elements as a tool to achieve improved
slow light performance with small group velocity dispersion and large bandwidth in photonic crystal
waveguides is investigated. A polyatomic photonic crystal waveguide, including two scatter elements
with different geometrical shapes in each primitive cell, is proposed to investigate the feasibility
of our method. Numerical results show that a versatile control of the dispersion relation of slow
light modes, with large normalized delay-bandwidth products ranging from 0.2085 to 0.3394, can be
obtained using a unique geometrical parameter.
© 2012 Chinese Optics Letters
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