Guilin Sun
Ansys Employee

You can write a post for ay questions, or if you have peers with same interest, you may create a Forum Feed and invite them for discussion.

For tapers, we have examples online:

Linear waveguide taper 

Polarization converter using a tapered waveguide

Curved waveguide taper (varFDTD and FDTD) 

HAMR - tapered waveguide

Please indicate which solver you are using and what the problem you have.