$pattern tri period

The pattern tri period is the same definition in pattern type as the

$pattern_tri_period
pattern_tri_num
pattern_type N_period period_space $x_1$ $y_1$  $x_2$ $y_2$  $x_3$ $y_3$  $n_r$ $\alpha$ if_empty

For a triangular shape, we need 3 points (x1,y1), (x2,y2), and (x3,y3) to define the triangular shape. Then the refractive index and the absorption coefficient is put in the simulation.

Parameter Explanation

• n : number of empty section.
• type : type1=triangle, type2=circle, type3=ellipse, type4=rectangular, type5=Sinkx function up, type6=Sinkx function down, type7=Sinkx function up, type8=Sinkx function down.
• f1-f6 : you can refer to the information where at bottom of this page.
• int_period_num :
• f_period_spacing :

Example

Type.1~4 are triangle, circle, ellipse and rectangle.

If the parameters are not show in the figure, you should set those parameters as 0.

Type5~8 are sine shape period structure.

Type.5 and 6 can be determined by this expression:

$f_6<y<f_{1}sin{f}_{2}x+f_3;$

$f_4<x<f_5$

Type.7 and 8 can be determined by this expression:

$f_6<x<f_{1}sin{f}_{2}y+f_3;$

$f_4<y<f_5$

$emptyperiodshape,