StepAction
1Open the OptiFDTD Waveguide Layout Designer.
2To create a new project, select File > New.

The Initial Properties dialog box appears.

3Click Profiles and Materials.

The Profile Designer window appears.

4Under the Materials folder, right-click the Dielectric folder and select New.

A new Dielectric material dialog box appears.

5Type the following information:

Name: er=8.9

Refractive index (Re:): 2.983287

6Click Store.

Defining the channel profile

StepAction
1Under the Profiles folder, right-click the Channel folder and select New.

The ChannelPro1 dialog box appears.

2Create the following channel profile:

Profile name: Profile_PhC

2D profile definition

Material: er=8.9

3D profile definition

Layer name: layer_01

Width: 1.0

Thickness: 1.0

Offset: 0.0

Material: er=8.9

3Click Add.
4Click Store.
5Close the Profile Designer.

Defining wafer and waveguide properties

StepAction
1In the Initial Properties dialog box, type/select the following:

Waveguide Properties

Width [μm]: 1.0

Profile: Profile_PhC

Wafer Dimensions

Length [μm]: 10.0

Width [μm]: 10.0

2D Wafer Properties

Material: Air

3D Wafer Properties

Cladding

Thickness [μm]: 1.0

Material: Air

Substrate

Thickness [μm]: 1.0

Material: Air

2Click OK.

The Initial Properties dialog box closes.

Creating the PBG crystal structure

StepAction
1From the Draw menu, select PBG Crystal Structure.
2Click in the layout window to create the PBG area.

The PBG Crystal Structure appears in the layout window.

3Click on the Select tool.
4To set the PBG properties, double-click on the PBG Crystal Structure in the layout.

The Crystal Lattice Properties dialog box appears (see Figure 27).

FDTD - Figure 27 Crystal Lattice Properties dialog box

Figure 27: Crystal Lattice Properties dialog box

5In Origin, Offset, type/select the following:

Horizontal: 3.0

Vertical: -3.0

6Click Evaluate.
7Type/select the following:

Depth: 0.0

Azimuth [deg]: 0.0

8In Lattice Properties, select Type: 2D Rectangular.
9In Lattice Dimensions, type/select the following:

Scale: 1.0

#A: 6

#C: 6

10In Label, type PBGCrystalStruct1.

Note: Do NOT close the Crystal Lattice Properties dialog box.

Setting the atom properties

To set the atom properties, perform the following procedure in the Crystal Lattice Properties dialog box.

StepAction
1In Atom Waveguide in Unit Cell, Add New, select Elliptic Waveguide from the drop-down menu and click New.

The Elliptic Waveguide Properties dialog box appears.

2In Center, Offset, type/select the following:

Horizontal: 0.0

Vertical: 0.0

3Type/select the following:

Major radius: 0.2

Minor radius: 0.2

Orientation Angle: 0.0

Channel Thickness Tapering: Use Default (Channel: None)

Depth: 0.0

Label: Atom

Profile: Profile_PhC.

4Click OK.

The Elliptic Waveguide Properties dialog box closes.

Note: When you return to the Crystal Lattice Properties dialog box, you will see the defined elliptic waveguide listed in Atom Waveguide in Unit Cell (see Figure 29).

5Click OK in the Crystal Lattic Properties dialog box.

FDTD - Figure 28 Defined elliptic waveguide in Unit Cell Edit table

Figure 28: Defined elliptic waveguide in Unit Cell Edit table

FDTD - Figure 29 Defined PhC structure in layout

Figure 29: Defined PhC structure in layout