The Finite-Difference Time-Domain (FDTD) method is a numerical technique used to solve Maxwell’s equations, which describe the behavior of electromagnetic waves. The FDTD method discretizes both space and time, allowing for the simulation of electromagnetic wave propagation in various media. Lumerical FDTD is a commercial software that implements the FDTD method to simulate optical systems.
region= waveguide, time_step=0.01e-15, spatial_step=20e-9, boundary_conditions="PML lumerical fdtd tutorial pdf
x_min=0, x_max=10e-6, y_min=0, y_max=10e-6, z_min=0, z_max=10e-6, material="Si" ) Si = Material( and it is surrounded by air.
In this example, we will simulate an optical waveguide using Lumerical FDTD. The waveguide has a rectangular cross-section with a width of 500 nm and a height of 200 nm. The waveguide is made of silicon, and it is surrounded by air. lumerical fdtd tutorial pdf