1. Plane wave scattering on a stratified layer
Computation using Lumerical
GIST, Prof. Yong-Gu Lee

2. Objective
100nm thick gold layer is illuminated with a plane p-polarized in the orthogonal direction. Compute the total electric field distribution.

3. Lauch Lumerical FDTD and start from an empty object layout, create a region
Toolbar: Simulation->Region
Object tree: FDTD->Right mouse
2D simulation
Medium is water with index of refraction 1.33
X span 100nm, Y span 200 nm

4. Create a mesh of particular width and depth
Toolbar: Simulation->Mesh
Object tree: mesh->Right mouse
X span 100nm, Y span 200 nm

5. Create a gold substrate
Double click Quadrilateral
X span 150nm, Y span 100 nm

6. Set boundary conditions
Bloch boundary condition in the x-axis

7. Set the material for the substrate
Au (Gold) – Johnson and Christy

8. Create a plane wave

9. General property of the plane wave

10. The origin of the plane wave and the applied space

11. Set the frequency (1070nm) of the plane wave

12. The overall layout and graphical nomenclature

13. Point monitor

14. Ready to run

15. Oops material explorer appears… Press fit and plot

16. Second oops
Drexler(process 0): The program terminated due to an error:There is no possible parallel processor layout that can be used because the simulation volume is too small. Please reduce the number of processors or contact Lumerical Technical Support for more information.

17. Mesh resolution problem
Change x mesh from 15 nm to 1 nm

18. After successful run visualize E.

19. 0.361504 at the gold/medium interface

20. Compare this with the analytic solution