Quiz — Lumerical FDTD — FDTD Solver Region

Which of the following statements are true? 

Which of the following methods can be used to show the simulation mesh in the CAD view ports? 

Which of the following settings are properties of the FDTD solver region? 

Which of the following statements about 2D simulations are true? 

In the Mesh settings tab, a uniform mesh type is used and it is set up to use a maximum mesh step size of 0.1 nm, and the minimum mesh step size setting is 0.25 nm. What will be the target mesh step size used by the simulation? 

For example, if the answer is 0.71 nm, type in 0.71.

Which of the following are valid methods for setting up the simulation mesh? 

In the following image, the boundary conditions are not set up correctly. What is the problem with the settings?

Which of the following can be set from the Advanced options tab of the FDTD solver region? 

In the following image, no symmetry is applied in the boundary conditions. Which boundary condition could be used for the x min boundary to take advantage of the symmetry of the structure and source?

This exercise simulates a waveguide y-splitter where the fundamental TE waveguide mode (where E fields are primarily y-polarized) is injected at the input and the light is split between two output waveguides. Run the associated script file to set up the simulation.

Start by running the simulation. After running the simulation, right-click on the T monitor and visualize the T result which gives the fraction of power that is transmitted through one branch of the y-splitter. Make a note of this value.

Change the boundary conditions to use symmetry where possible. Run the simulation to verify that you get the same transmission result as before. Choose the boundary condition you used for each boundary.

Boundary 1

x min:

(Continued from the previous question)

Boundary 2

x max:

Boundary 3

y min:

Boundary 4

y max:

Boundary 5

z min: