Using the same layout created in 2D-TE plane wave in unique material, create another file with the same layout by selecting File > Save As and using a different file name.

StepAction
1From the Edit menu, select Wafer Properties.

The Wafer Properties dialog box appears.

2Click the 3D Wafer Properties tab and set the Cladding: Material and Substrate Material to N=2.
3Click OK.

The Wafer Properties dialog box closes.

4To edit the input plane, double-click on the input plane in the layout.

The Input Plane Properties dialog box appears.

5On the General tab, type/select the following:

Continuous Wave

Wavelength [μm]: 2.0

Input Field Transverse: Rectangular

Plane Geometry:

Z Position [μm]: 1.0

6On the 3D Transverse tab, type/select the following:

Center Position [μm] X: 0.0

Halfwidth [μm] X: 5.0

Center Position [μm] Y: 0.0

Halfwidth [μm] Y: 5.0

Tilting Angle [deg]: 0

Effective Refractive Index: Local

Polarization: LinearY

Select the Amplitude radio button and type: Amplitude [V/m2]: 1.0

7Click OK.

The Input Field Properties dialog box closes.

Setting the 3D-Y-direction polarized plane wave simulation parameters

StepAction
1From the Simulation menu, select 3D Simulation Parameters.

The 3D Simulation Parameters dialog box appears.

2Type/select the following information:

Mesh Delta X [μm]: 0.1

Mesh Delta Y [μm]: 0.1

Mesh Delta Z [μm]: 0.1

3Click Advanced….

The Boundary Conditions dialog box appears.

-X: PMC

+X: PMC

-Y: PEC

+Y: PEC

-Z: Anisotropic PML

+Z: Anisotropic PML

Anisotropic PML Calculation Parameters

Number of Anisotropic PML Layers: 10

Theoretical Reflection Coefficient: 1.0e-12

Real Anisotropic PML Tensor Parameters: 1.0

Power of Grading Polynomial: 3.5

4Click OK.

The Boundary Conditions dialog box closes.

5In Time Parameters, click Calculate.

The default time step size is calculated.

6Select Run for 1000 Time Steps (Results Finalized).
7Select Key Input Information: Input Plane1 and wavelength:2.00.
8Select DFT Options: Electric Components: Ey.
9Click Run to start the OptiFDTD Simulator.

When the simulation is running, the plane wave effect can be observed in the
simulator (see Figure 26).

FDTD - Figure 26 3D Y-direction polarized plane wave

Figure 26: 3D Y-direction polarized plane wave