Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Vector optics: longitudinal fields in boundary conditions
Posted 2025年4月10日 GMT+8 23:41 Electromagnetics, Wave Optics 0 Replies
Please login with a confirmed email address before reporting spam
Hi! I want to model a tightly focused laser beam in the frequency domain wave optics module, I am interested in diffraction in various micrometer scale geometries. Let's say the laser beam propagates along the z-axis. For my applications, Ez is as important as Ex, Ey.
What is the correct way to excite some optical system with a fully vectorial optics laser beam of arbitrary analytical envelope? I would like to use matched boundaries on all sides except the boundary where the laser comes from.
I have tried using scattering boundary conditions with incident field, but that ignores Ez. I also tried using surface (electric and magnetic) current densities but that also does not allow for any z-component of the electric field. It seems that what I want is a time harmonic surface charge density boundary condition, but that is only available in the semiconductor modules.
Thanks in advance for any advice!
Hello Johan Ribbing
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.