Abstract
One dimensional photonic crystal based optical band pass filter has been analyzed using coupled mode
approach in order to achieve a desired filter response in terms of full width at half maximum. The power transmittance
through successive primitive cells of the crystal has been rationalized by considering weak coupling between the
forward and specularly reflected waves within the crystal, which is modeled as distributed feedback structure. The
time constants, associated with the optical resonator and responsible for a weakly coupled eigen mode to exist, have
been estimated. These time constants would actually be used to determine the number of primitive cells, on either side
of a defect, required to build up a desired mode. The collateral observations provide necessary conditions of
resonance.
© 2014 IEEE
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