How to get the Reflection Parameters of a Metamaterial illuminated by a Circularly Polarized Wave?

I am trying to design a Circularly Polarization sensitive metasurface absorber. I want to know , how to Get the Refelctance (or S parameters) when I try to illuminate a metasurface unit cell with a Circularly Polarized wave. The Circularly Polarized wave is being incident on the unit cell through floquet port having two modes, 90degree out of phase from each other. I have only one port here as the side other than the side being illuminated is having a perfect conductor. I am able to plot the S(FloquetPort1:1,FloquetPort1:1) ; S(FloquetPort1:2,FloquetPort1:2); ActiveS(FloquetPort1:1) and ActiveS(FloquetPort1:2) plots.

Now, I am unable to get the Reflectance of "Circularly Polarized wave" ,as addition of the Active S-Parameters gives me same result for both handedness of the incident CP wave. In a latter stage, I also want to develop the unit cell absorption.


Any help would be appreciated.😊

Answers

  • pmunagapmunaga Forum Coordinator

    Hi @Sylvie,

    Thanks for reaching us and we appreciate your patience.

    Can you confirm that you are looking for extracting the S parameters of the combined excitation (Circular polarized wave) with the available modes in the Floquet port or you are not getting different results for different handedness of the circular polarized wave?

    All the very best.

    Best Regards,

  • Thank you for your reply.

    Yes, I am looking forward to extract the S parameters of the combined excitation (Circular polarized wave) with the available modes in the Floquet port.

    I am able to see differences in ActiveS Parameters when the handedness of the circularly polarized wave is changed, as my unit cell is asymmetric. My structure is supposed to absorb a particular handedness (say Left Handed Circular polarized) of CIrcularly Polarized incident wave, and reflect the waves which are of orthogonal polarization (here, Right Handed Circularly polarized).

    Looking forward for a solution.

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