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    #37325
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    perveen akhter
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    sorry for the typo. I mean changing TE to TM

    #37324
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    perveen akhter
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    TE and TM are switched in FDTD. so you may want to check it by ching TE to TM

    #17210
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    perveen akhter
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    Hi Vignes,
    I am trying silicon oxide grating on silicon substrate in 3D. but in 3D simulations, there is no crosscut view type option to see the field pattern or farfield which we can do in 2D. and for titled input reflection and trasnmission is not making much sense to me .
    if you have any idea
    thanks,
    Perveen

    +1
    #17209
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    perveen akhter
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    Hi Saurav,
    did you get the photonic crystal in slab problem solved, I tried the same paper triangular lattice parameters but not getting the bandgap same as in the paper, please let me know if you were able to reproduce the bandgap from reference.
    thanks,
    Perveen.

    #17124
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    perveen akhter
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    still getting negative absorption. could this be coming from any interference coz of input angle being 45 deg????
    thanks,
    Perveen.

    #17114
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    perveen akhter
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    Hi there, I am getting a lot of negative absorption (r+t>1). I changed the size and positions of the input but its still not working. can someone please help me. files are attached

    #17095
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    perveen akhter
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    Hi Damien,
    I need your help with this layout simple thin film on si substrate with input at 45 deg. for some reasons I am getting negative absorption.
    attached is the layout and plot.
    thanks,
    Perveen.

    #17035
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    perveen akhter
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    no, but you can definitely import it into matlab and plot it.

    #16965
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    perveen akhter
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    is your problem solved? what version are you using. I am trying the same kind of layout.

    #16963
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    perveen akhter
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    here is the link of paper, I am tryig to get figure 1c
    https://www.ntt-review.jp/archive/ntttechnical.php?contents=ntr200909rp1.html
    also file is attached.

    also I am trying to get trial version of fdtd 12, but coz my email is already on your system, its not accepting my request. can you please help me with that too. thank you very much.

    #16962
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    perveen akhter
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    Hi Damian,
    I am also working on the same kind of structure, but your this file cannot open in fdtd 9.0. can you please upload a similar version for fdtd 9.0
    thanks,
    Perveen.

    #16838
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    perveen akhter
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    no, its grating on silicon substrate.to see the coupling, I am trying input at different angles, and I am using plane wave GMCW.

    #16831
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    perveen akhter
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    if you have any sample layout that would be great.

    #16830
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    perveen akhter
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    Hi Damian,
    I am trying to use plane wave input at 45 deg. but I feel that won’t cover my whole layout, is there any way to compensate for that, or can I move the center of input to at one end of x intsead of x=0.
    thanks,
    Perveen.

    #16764
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    perveen akhter
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    Marek, how about the dispersive materials also?