Reply To: Mode profile for a structured optical nanofiber

[Guilin Sun]

It is better to check the mode using a mode source on the waveguide.

For the monitor, it records all the fields excited by the abruption of the waveguide. eg, some higher order modes are excited this is why the field intensity does not go zero.  You can use ports or expansion monitor to check the higher-order modes: Using and understanding Mode Expansion Monitors – Ansys Optics