Surface plasmon waveguide

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    • March 11, 2015 at 2:50 am #18502
      Sandeep Yenchalwar
      Participant

      Hi,
      In the surface_plasmon_waveguide FDTD samples why we have to create
      1) Metal Ag_1
      2) Dielectric 1.414_1
      3) Metal_Ag_new_1
      in channel profiles as well as in the materials section for a single element for 2D and 3D simulation.

    • March 11, 2015 at 9:14 am #18515
      Damian Marek
      Participant

      The method for editing waveguides is based on setting the profile and the material of the profile. To create a metal waveguide you need the material characteristics and the default dimensions for the structure.

    • March 11, 2015 at 9:37 am #18523
      Sandeep Yenchalwar
      Participant

      Thanks Damian for you reply..
      Does that mean for the 2D and 3D simulations we have to use different sets of values.

      • March 11, 2015 at 9:45 am #18524
        Damian Marek
        Participant

        Well besides the depth or thickness no it could be the same. You will notice there are two sections in the profile for the 2D characteristics and the 3D characteristics.

    • March 11, 2015 at 9:48 am #18527
      Sandeep Yenchalwar
      Participant

      Hi Damian,
      I’ve attached a file where i want to simulate the plasmonic field. I’ve used lorentz-drude values is that correct or I’ve define separately RI and Die-costant values. Is it ok to have domain size larger than the size of Si and Ag slab? And one more thing i want to know what will be the effect of Gaussian modulated continuous wave or continuous wave.

      Attachments:

      1. Si_Ag.jpg

      1. Si-Ag.fdt
    • March 11, 2015 at 11:32 am #18539
      Damian Marek
      Participant

      1) If you want to do any type of spectrum analysis it is important to have the Lorentz Drude model for dispersive materials.

      2) Yes, you can have a larger domain than the slab or objects you have placed. Generally this is needed to keep some space between the absorbing boundaries and the interactions of the field with the material surface. Remember that a large domain will result in a longer simulation.

      3) Gaussian modulated continuous wave allows one to simulate over a range of frequencies with one simulation, because of the broad frequency spectrum of a short pulse. The CW source is restricted to a single wavelength, but it can be simpler to determine the number of time steps needed. If you are not sure about which to choose, but you want some type of spectrum response I suggest the Gaussian modulated wave.

      Regards

      +2
    • March 12, 2015 at 12:42 am #18557
      Sandeep Yenchalwar
      Participant

      Thanks Damian..
      It is very helpful to me…

    • March 18, 2015 at 4:11 am #18838
      Dr. MohammadMahdi Ariannejad
      Participant

      Is it possible to have more example regarding to MZI and surface plasmon in the software? or any opto electronic?

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