Time domain simulation of dispersive materials from microwave to optical frequencies

Accurate material modeling is an important factor in simulation of dispersive materials. We present different dispersive models for the simulation of dispersive materials, and can be used from microwave to optical frequencies depending on the nature of application. Most of available dispersive models are in frequency domain, to make them consistent with time domain methods; different approaches are also discussed. The alternating differential implicit finite difference time domain method (ADI-FDTD) is implemented for few dispersive models and results are compared with the FDTD method.