ABSTRACT
For investigating phenomena such as wave guiding, radiation and scattering, Maxwell’s equations are required to be solved numerically. The finite difference in time-domain (FDTD) method for solving Maxwell’s equations was first proposed by Kane S. Yee. As the computational capabilities of computers are increased with time, FDTD method becomes more and more pertinent for studying a variety of electromagnetic problems. Here, in this chapter, the FDTD method is discussed briefly and then spectral analysis of photonic bandgap structure (PBGS) is carried out using of FDTD method. PBGS plays an important role in the modern optical communication system for manipulating light energy. In the last section of the chapter, it is shown how the PBGSs with predetermined materials widths are used to design narrowband optical filter at 1550 nm.
