Sinev, IvanRichter, FelixToftul, IvanGlebov, NikitaKoshelev, KirillHwang, YongsopLancaster, David G.Kivshar, Yuri S.Altug, Hatice2025-07-052025-07-052025-07-042025-07-0210.1038/s41467-025-61221-2https://infoscience.epfl.ch/handle/20.500.14299/251944Chiral metasurfaces provide invaluable tools for controlling structured light required for biosensing, photochemistry, holography, and quantum photonics. Here we suggest and realize a universal strategy for engineering chiral response of resonant metasurfaces via the interplay of meta-atom geometry and lattice arrangements within all five possible planar Bravais symmetries. By introducing chiral gradient metasurfaces, we illustrate how our approach allows producing a predictable chiral response tunable by simple parameter variations. We highlight that the symmetry-controlled chiral response provides an additional degree of freedom in optical signal processing, and showcase this with simultaneous mid-IR image encoding in two fundamental quantities, transmission and circular dichroism. Our proposed concept represents a universal toolkit for on-demand design and control of chiral metastructures that has potential for numerous applications in life sciences, quantum optics and more.enChirality encoding in resonant metasurfaces governed by lattice symmetriestext::journal::journal article::research article