Photonics

Photonics

FDE mode solver (2d-z ), E field is dominant to the Ez ( weak on Ex and Ey)

    • yue an
      Subscriber

      Hi! I am a beginner in Lumerical simulation.  When I use FDE (

      2-D z normalized solver)to simulate all the possible modes in the photonic crystal structure. I got a mode that has a strong E field in the z-direction and is really weak on Ex and Ey which is weird based on my understanding. Do anyone know what is going on or just me having this problem.

       

    • Guilin Sun
      Ansys Employee

      It is correct result, as now you are simulating a waveguide that confines the mode in a very small area. This is different from the traditional, textbook weak waveguide which has neglegible longitudinal field components. Acutally now the mode is hybride, not the conventional transveral mode that can have only Ex and(or) Ey.

    • yue an
      Subscriber

      But FDE is a 2d dimension mode solver, how do you calculate the Ez in simulation.

    • Guilin Sun
      Ansys Employee

      it is polarization pointing out of the cross section. and in this case it is the longitudinal field component. Please refer 

      Ansys Insight: 有关TETM偏振以及模式光源的问题

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