Learning Forum

[Muhammad Danial Haziq Azizan]

Hye

Regarding the Q-factor PhC cavity from the example. I have tried to make the value of q-factor to 10power of 6. But, I only obtained around 1 power of 3 only. Can someone help me?

[Muhammad Danial Haziq Azizan]

Number of monitors if nx and ny give any effect to value Q-factor? How to located 

[Guilin Sun]

Yes, you need to carefully set the simulation:

1: make sure the mesh is periodic along the periodic direction, eg, use integer number of mesh points with override mesh

2: place the dipole in its most effective location, eg, if the mode exhibits Ex property, place it in Ex location of the Yee cell. If you do not know, please at least 3 dipoles at Ex,Ey and Ez location in the Yee cell.

3: make sure the analysis group is set properly: you may need to modify the time monitor locations to where the field intensity is strong from a profile monitor. Thus this is an iterative simulation.

4: make sure to choose proper time segment in the analysis group, so the result is linear. 

https://optics.ansys.com/hc/en-us/articles/360041611774-Quality-factor-calculations-for-a-resonant-cavity

https://optics.ansys.com/hc/en-us/articles/1500006350801-Tips-for-simulating-high-Q-Photonic-Crystal-PhC-Cavity 

Please