Reply To: Arbitrary sign for eigen mode

[amitrotem2]

 

You mean this;
set("direction", "Backward")
Why would you disable that ? If you leave it as is you get values close to 1

 

 ?abs(Smat);
result: 
0.00548752  0.0184426  0.99328  0.977123  
0.00729792  0.0060976  0.999832  0.9935  
0.99337  0.99988  0.000633771  0.000932185  
0.977351  0.9933  0.00385249  0.00270568  

 

The whole point is to have some shift along the Y direction like in Bragg grating. Are you worried about the intersection areas? you can add a narrow block along the other block, still get the same result. Even if y_shift is 20 nm, you still get the minus signs.