In the previous tutorials we were interested in finding band gaps of 1D, 2D and 3D photonic crystal structures. No modes are allowed with frequencies inside the gap. By perturbing a lattice at a single site we may permit an existence of a localized point- defect mode or set of such modes that have frequencies within the gap. We will show how to detect and view such defects in 2D photonic crystals in this tutorial.

Note:

•     In this lesson, it is presumed that you already read the PWE Tutorials 1 to 3.

•     For the details on how a lattice can be created, please refer to Lesson 3— Photonic crystal and photonic band gap simulation and Lesson 9—FDTD Band Solver.

•     For the details on how material and waveguide profile can be created, please refer to Lesson 1 through to Lesson 9.

•     To define the variable, please input the variable name in the Initial Properties dialog box.  Click OK to access the Variables and Function dialog box to define the values.