Pixelated metasurfaces for linear-polarization conversion and absorption

Terahertz metasurfaces with pixelated meta-atoms were designed for linear-polarization conversion and absorption. The differences between the two functionalities emerged from the number and arrangement of metal-dielectric combos patching some but not necessarily every pixel of each meta-atom. A patching arrangement for a meta-atom with 3 x 3 pixels yielded polarization conversion ratio (PCR) > 0.9 over the 10.20–16.08 THz band, whereas another yielded absorptance (A) > 0.9 over the 27.67–28.73 THz band. A third patching arrangement delivered both functionalities, albeit in different spectral regimes: high PCR and high A at 13.92 THz and 29.1 THz, respectively. The spatial profiles of the electric and magnetic fields in each meta-atom suffice to explain the display of these functionalities. The generality of the pixelated meta-atom approach was supported by a meta-atom with 4 x 4 pixels.

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Work Title Pixelated metasurfaces for linear-polarization conversion and absorption
Access
Open Access
Creators
  1. Rajan Agrahari
  2. Akhlesh Lakhtakia
  3. Pradip Kumar Jain
  4. Somak Bhattacharyya
Keyword
  1. Metasurface
  2. Pixelated meta-atom
  3. Absorber
  4. Polarization converter
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Journal of Electromagnetic Waves and Applications
Publication Date November 2, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1080/09205071.2021.1998928
Deposited July 26, 2022

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Version 1
published

  • Created
  • Added Agrahari_21_1v21B.pdf
  • Added Creator Rajan Agrahari
  • Added Creator Akhlesh Lakhtakia
  • Added Creator Pradip Kumar Jain
  • Added Creator Somak Bhattacharyya
  • Published
  • Updated Keyword, Description, Publication Date Show Changes
    Keyword
    • Metasurface, Pixelated meta-atom, Absorber, Polarization converter
    Description
    • <p>Terahertz metasurfaces with pixelated meta-atoms were designed for linear-polarization conversion and absorption. The differences between the two functionalities emerged from the number and arrangement of metal-dielectric combos patching some but not necessarily every pixel of each meta-atom. A patching arrangement for a meta-atom with (Formula presented.) pixels yielded polarization conversion ratio (PCR) (Formula presented.) over the 10.20–16.08 THz band, whereas another yielded absorptance (A) (Formula presented.) over the 27.67–28.73 THz band. A third patching arrangement delivered both functionalities, albeit in different spectral regimes: high PCR and high A at 13.92 THz and 29.1 THz, respectively. The spatial profiles of the electric and magnetic fields in each meta-atom suffice to explain the display of these functionalities. The generality of the pixelated meta-atom approach was supported by a meta-atom with (Formula presented.) pixels.</p>
    • <p>Terahertz metasurfaces with pixelated meta-atoms were designed for linear-polarization conversion and absorption. The differences between the two functionalities emerged from the number and arrangement of metal-dielectric combos patching some but not necessarily every pixel of each meta-atom. A patching arrangement for a meta-atom with 3 x 3 pixels yielded polarization conversion ratio (PCR) > 0.9 over the 10.20–16.08 THz band, whereas another yielded absorptance (A) > 0.9 over the 27.67–28.73 THz band. A third patching arrangement delivered both functionalities, albeit in different spectral regimes: high PCR and high A at 13.92 THz and 29.1 THz, respectively. The spatial profiles of the electric and magnetic fields in each meta-atom suffice to explain the display of these functionalities. The generality of the pixelated meta-atom approach was supported by a meta-atom with 4 x 4 pixels.</p>
    Publication Date
    • 2022-01-01
    • 2022-11-02
  • Updated