Dear all,

I hope you are doing well.

It is well-known that the field components of a TE wave in xz plane (front view) are (Hx,Ey,Hz), while for a TM wave in xz plane (front view) are (Ex,Hy,Ez) as derived in many textbooks.

It is also well-known that for an incident Gaussian wave on an interface in (xy plane-front view), there is only Ez component (out of plane) that defines this TE wave and this is consistent with the previous paragraph.

My problem is:

I want to excite a TM (p-polarized) out of plane Gaussian wave in a boundary in 2D COMSOL model to act as a fiber source. However, when I enter the gaussian expression in (Hz) component of the port, there will be no transmission in the waveguide and the all transmissions went to zero whatever I change in the waveguide. (Definitely, I am sure that the waveguide supports the propagation of p-polarization wave).

My second question:

How can I apply a 3D gaussian wave with COMSOL boundary? what is the expression?

Thank you for your time and your replies.

Yours sincerely,