Chirping effects on the propagation of a Gaussian pulse in defective photonic crystals

This study examines the propagation of positively (negatively) linearly (quadratically) chirping pulses in one-dimensional photonic crystals with two-layer dielectric defects. We examine how the carrier frequency, time width, sign, and order of the input pulse influence the time envelope and properties of the transmitted chirping pulse. The findings reveal that transmitted chirping pulses can take on two distinct compressed forms or be expanded and exhibit either single-peaked or multi-peaked characteristics. Also, we compared the average duration and energy of transmitted short and longer chirping pulses to those of non-chirped pulses at the maximum and minimum carrier frequencies. Our findings will aid in the design of photodiodes and improve digital data transmission.