Dear folks,
I am trying to simulate a point source illuminating on a stacked films extending to infinite. A intuitive way to truncate the film, I think, is to use PML. However, when extending the layered film material into PML, the performance of PML obviously is not good, even worse than Scattering BC without PML. I attached a figure showing the field, compared to a FDTD result, reflection from the PML boundary is apparent. COMSOL technique support also indicates that PML does not work well for infinite films, and suggests to live with SBC. So I am wondering is anyone here has encountered similar problem and can share the experience. Thanks a lot.
Best Regards,
Leiming
I am trying to simulate a point source illuminating on a stacked films extending to infinite. A intuitive way to truncate the film, I think, is to use PML. However, when extending the layered film material into PML, the performance of PML obviously is not good, even worse than Scattering BC without PML. I attached a figure showing the field, compared to a FDTD result, reflection from the PML boundary is apparent. COMSOL technique support also indicates that PML does not work well for infinite films, and suggests to live with SBC. So I am wondering is anyone here has encountered similar problem and can share the experience. Thanks a lot.
Best Regards,
Leiming