TY - GEN
T1 - Dispersion Engineered Nonlocal Metasurfaces with Customizable Wavefront-Selectivity
AU - Kasahara, Yoshiaki
AU - Overvig, Adam
AU - Xu, Gengyu
AU - Alu, Andrea
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - We propose and demonstrate nonlocal metasurfaces with wavefront-selective customizable features. In particular, we engineer in extreme ways the modal dispersion of metasurfaces, to go from positive to negative curvature across a flat dispersion regime. This result opens a new degree of freedom to selectively control metasurface responses, added to the already rich opportunities of nonlocal metasurfaces, such as frequency and polarization selectivity, as well as unitary-efficiency wavefront manipulation. We achieve customizable wavefront-selectivity by adding metallic via walls into bilayer nonlocal metasurfaces, which control the lateral energy transfer inside the metasurface while preserving the desired nonlocal properties imprinted in the bilayer. Based on these principles, we demonstrate highly-efficient wavefront-selective and wavefront-independent anomalous reflection and focusing, combined with frequency and polarization selectivity.
AB - We propose and demonstrate nonlocal metasurfaces with wavefront-selective customizable features. In particular, we engineer in extreme ways the modal dispersion of metasurfaces, to go from positive to negative curvature across a flat dispersion regime. This result opens a new degree of freedom to selectively control metasurface responses, added to the already rich opportunities of nonlocal metasurfaces, such as frequency and polarization selectivity, as well as unitary-efficiency wavefront manipulation. We achieve customizable wavefront-selectivity by adding metallic via walls into bilayer nonlocal metasurfaces, which control the lateral energy transfer inside the metasurface while preserving the desired nonlocal properties imprinted in the bilayer. Based on these principles, we demonstrate highly-efficient wavefront-selective and wavefront-independent anomalous reflection and focusing, combined with frequency and polarization selectivity.
UR - http://www.scopus.com/inward/record.url?scp=85172419079&partnerID=8YFLogxK
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U2 - 10.1109/USNC-URSI52151.2023.10238048
DO - 10.1109/USNC-URSI52151.2023.10238048
M3 - Conference contribution
AN - SCOPUS:85172419079
T3 - IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
SP - 1773
EP - 1774
BT - 2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023 - Proceedings
T2 - 2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023
Y2 - 23 July 2023 through 28 July 2023
ER -