Dual resonant transmissive circular dichroism in a rotationally transformed chiral metasurface
4 affiliations
- 1James Watt School of Engineering, University of Glasgow, Glasgow, UK
- 2School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
- 3Microlynx Systems Ltd, Calgary, AB Canada
- 4School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Islamabad, Pakistan
Abstract
An electrically thin bilayer chiral metasurface is presented for dual resonant, same handedness circular-polarization-selective transmission in the X-band. The 11 × 11 mm2 connected unequal-arm unit cell produces forward right-handed circularly polarized (RHCP) circular dichroism (CD) maxima of 0.72 and 0.75 at 9.672 and 10.636 GHz within a common transmission window, with reciprocal backward left-handed circularly polarized (LHCP) selectivity and a complete CD null at 10.3 GHz. A controlled four-configuration comparison shows that the compound front–back transformation establishes chiral interlayer coupling, whereas unequal terminal paths enable the second modal contribution. Surface-current distributions identify a lower even mode, an intermediate mixed state, and an upper odd interlayer-coupled mode. A geometry-derived equivalent-circuit model reproduces the broadband full-wave transmission response, and free-space measurements of an aperture of 29.7 × 20.9 cm² validate the polarization-selective behavior. The demonstrated response supports passive circular-polarization-selective receiver front ends and provides a polarimetric sensing platform for non-contact CFRP assessment.
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BibTeX
@article{noman2026dual,
title = {{Dual resonant transmissive circular dichroism in a rotationally transformed chiral metasurface}},
author = {Muhammad Noman and Jalil Kazim and Adnan Zahid and Hassan T. Chattha and Farooq A. Tahir and Muhammad Imran and Qammer H. Abbasi},
journal = {Npj Wireless Technology},
year = {2026},
month = nov,
doi = {10.1038/s44459-026-00101-7},
url = {https://doi.org/10.1038/s44459-026-00101-7},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Dual resonant transmissive circular dichroism in a rotationally transformed chiral metasurface
AU - Muhammad Noman
AU - Jalil Kazim
AU - Adnan Zahid
AU - Hassan T. Chattha
AU - Farooq A. Tahir
AU - Muhammad Imran
AU - Qammer H. Abbasi
PY - 2026
DA - 2026/11/02
JO - Npj Wireless Technology
DO - 10.1038/s44459-026-00101-7
UR - https://doi.org/10.1038/s44459-026-00101-7
AB - An electrically thin bilayer chiral metasurface is presented for dual resonant, same handedness circular-polarization-selective transmission in the X-band. The 11 × 11 mm2 connected unequal-arm unit cell produces forward right-handed circularly polarized (RHCP) circular dichroism (CD) maxima of 0.72 and 0.75 at 9.672 and 10.636 GHz within a common transmission window, with reciprocal backward left-handed circularly polarized (LHCP) selectivity and a complete CD null at 10.3 GHz. A controlled four-configuration comparison shows that the compound front–back transformation establishes chiral interlayer coupling, whereas unequal terminal paths enable the second modal contribution. Surface-current distributions identify a lower even mode, an intermediate mixed state, and an upper odd interlayer-coupled mode. A geometry-derived equivalent-circuit model reproduces the broadband full-wave transmission response, and free-space measurements of an aperture of 29.7 × 20.9 cm² validate the polarization-selective behavior. The demonstrated response supports passive circular-polarization-selective receiver front ends and provides a polarimetric sensing platform for non-contact CFRP assessment.
SN - 3059-4391
ER -