Abstract
For one-dimensional (1-D) photonic crystals, the amplitude reversal in refractive index profile is defined as
an equivalent π phase shift. With these defined
π phase shifts, the binary phase-only sampling approach can
be implemented to design 1-D photonic crystal-based multichannel filters. Such filters exhibit high-count channels
and excellent channel uniformity, which is identical with the phenomena obtained in sampled fiber Bragg gratings
(SFBGs). Simulations of a nine-channel filter are given out and the distribution of reflection peaks is consistent
with that of SFBGs. Then, the impact of structural parameters on filtering characteristics (especially the
peak-trough contrast ratio) is discussed, such as optical length of unit cell, optical thickness ratio of alternate
dielectric layers, and apodization technique.
© 2007 IEEE
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