Create Structure

This section describes how to create certain complex structures in the software.

The software provides a wide range of structure types to meet the users' various needs of modeling complex structures. In terms of dimension, structures can be classified into 2D structures and 3D structures, as shown in Figure (a). In terms of structural shape, they can be classified into simple geometric structures, curve (Bézier curve) structures, extrusion (or revolution) structures created by functions, etc., as shown in Figure (b).

Create 2D Structure

2D structures are a special type of structure characterized by no thickness in the direction of the normal vector. These structures represent idealized approximations of ultra-thin materials in the software, and can be used for different simulations.

The software supports the functionality of adding 2D polygonal structures through scripts, allowing users to create complex structures through scripts according to their actual needs. The following two examples demonstrate how to create complex 2D structures.

Example: 2D Circle Ring

The following code demonstrates how to add a 2D circle ring structure using a script:

Rin = 0.5e-6;
Rout = 1e-6;
res = 100;
xin = Rin.*cos(linspace(0,2*pi,res));
yin = Rin.*sin(linspace(0,2*pi,res));
xout = Rout.*cos(linspace(0,2*pi,res));
yout = Rout.*sin(linspace(2*pi,0,res));
V = [xin,xout;
     yin,yout];
add2dpolygon;
set("name","2d ring");
set("vertices",V);

After running the script, the structure created is shown in the figure below (the image has been processed):

Example: Cross-Shaped Hole

The following code demonstrates how to add a 2D cross-shaped hole structure using a script:

x_span = 2e-6;
y_span = 2e-6;
W = 1e-6;
L = 0.4e-6;

x = [W/2;L/2;L/2;-L/2;-L/2;-W/2;-W/2;-L/2;-L/2;L/2;L/2;W/2];
y = [L/2;L/2;W/2;W/2;L/2;L/2;-L/2;-L/2;-W/2;-W/2;-L/2;-L/2];

V = [x,y;
     W/2,0;
     x_span/2,0;
     x_span/2,-y_span/2;
    -x_span/2,-y_span/2;
    -x_span/2, y_span/2;
     x_span/2, y_span/2;
     x_span/2,0;
     W/2,0];
add2dpolygon;
set("name","2d cross hole");
set("vertices",V);

After running the script, the structure created is shown in the figure below (the image has been processed):

Curved Structure

Example: S-Bend Waveguide

Edit Structure

After creating a Sidewall bezier structure, if you need to edit its structural parameters, you can either right-click the structure in the object tree or double-click it in the Composite viewer to open the Edit Structure Properties window.

In the parameter window of the Sidewall bezier structure, the Sidewall tab includes the following functionalities:

The Poles of bezier curve tab can be used to set up the poles of the Sidewall bezier structure.

For more settings in the Geometry tab, see Structure. The parameters setup for this example are shown in the figure below:

Structure Inspection

The S-bend waveguide structure is shown in the figure below:

Equation-Controlled Structure

Edit Structure

After creating an Equation structure, you can set up its geometric dimensions. See Structure for settings.

Structure Setting

Click the Geometry > Equation tab. You can set up the equations used to create structures.

Example: Create Extrusion Structure

After adding an Equation structure, the geometry and equation settings of the structure are shown in the following figure. After all the parameters are set up, you can visualize the structure in the Composite viewer.

Example: Create Revolution Structure

After adding an Equation structure, the geometry and equation settings of the structure are shown in the following figure. After all the parameters are set up, you can visualize the structure in the Composite viewer.