angle of polarization

Hello, everyone!
I work with a comsol 5.0. Can you help me to define the angle of a polarization of an incident light which differs from TM or TE?
I use ports:
1) When TE is a incident light that I define : E = {0, exp(-i*kax*x),0}, where kax = emw.k0
2) For TM incident light I defined a port 1: E = {cos(alpha)*exp(-i*kax*x), 0, sin(alpha)*exp(-i*kax*x)}, where alpha - incident light. On port 2: E = {cos(beta)*exp(-i*kbx*x), 0, -sin(beta)*exp(-i*kbx*x)}, where beta = reflected angle.
3) For angle of a polarization 45 deg in YOZ I define :
port1 : E = {cos(pi/4)*cos(alpha)*exp(-i*kax*x), cos(pi/4)*exp(-i*kax*x), cos(pi/4)*sin(alpha)*exp(-i*kax*x)}
port2 : E = {cos(pi/4)*cos(beta)*exp(-i*kbx*x), cos(pi/4)*exp(-i*kbx*x), -cos(pi/4)*sin(beta)*exp(-i*kbx*x)}
But it's not work. Where am i wrong?