TY - JOUR
T1 - Pixelated metasurfaces for linear-polarization conversion and absorption
AU - Agrahari, Rajan
AU - Lakhtakia, Akhlesh
AU - Kumar Jain, Pradip
AU - Bhattacharyya, Somak
N1 - Funding Information:
This work was supported by Science and Engineering Research Board [grant number ECR/2017/001485].
Publisher Copyright:
© 2021 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
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U2 - 10.1080/09205071.2021.1998928
DO - 10.1080/09205071.2021.1998928
M3 - Article
AN - SCOPUS:85118534340
SN - 0920-5071
VL - 36
SP - 1008
EP - 1019
JO - Journal of Electromagnetic Waves and Applications
JF - Journal of Electromagnetic Waves and Applications
IS - 7
ER -