Learning Forum

[ashish.singh]

as you can see purcell value given by the dipole has some negative value could you please explain why this is happening as purcell value cant be begative as described in your website (https://optics.ansys.com/hc/en-us/articles/360041612594-Purcell-factor-of-a-microdisk) which is just a ratio of powers. 
also it would be helpful for me to know how you caluculate purcell in the dipole section. I am looking for an answer as soon as possible .thanks for the reply in advance. 

[Guilin Sun]

It is likely due to 1: simulation time is not long enough ir autoshutoff min is larger ; 2 PML reflection. Please modify accordingly.

In addition, to get the highest Purcell factor, please place the dipole in the proper Yee mesh location according to its polarization. Please refer to this post:

https://innovationspace.ansys.com/forum/forums/topic/purcell-factor-calculation/ 

and

https://optics.ansys.com/hc/en-us/articles/360041612594-Purcell-factor-of-a-microdisk

[ashish.singh]

thanks for the reply. Really appreciate it . I would try the suggestions and write back.