Computing Transmissivity of One-Dimensional Defected Photonic Crystal Under Polarized Incidence for Band-Pass Filter Applications

Transmissivity of 1D defected photonic crystal is computed using transfer-matrix technique as function of wavelength for TM and TE mode of propagations. Layer dimensions and incidence angle are varied within practical range to study the change in wave propagation characteristics computed around 1.55 µm. Normalized defect density is varied within acceptable limit to observe the variation of transmission, which plays key role for application of the structure as band-pass filter. Results revel that defected crystal can be implemented in designing photonic b.p.f with acceptable passband width and confinement at the cut-off frequencies for optical communication.