  The chiral response from nanoantennas is useful for enabling advanced
applications in areas such as optical communication, sensing, and imaging, due
to its ability to selectively interact with circularly polarized light. Lattice
resonances in periodic nanoantenna arrays can enhance the optical response of
the nanostructure and facilitate stronger light-matter interaction. We design a
nanoantenna array made of highly conductive layered MXene material,
capitalizing on the lattice's unique properties to control the optical
response. We demonstrate the chiral properties of this periodic array of MXene
nanoantennas, and these properties are defined by the lattice periodicity.
Despite being a lossy optical material in the near-infrared range, the lattice
arrangement of MXene facilitates the excitation of stronger resonances, thereby
enhancing its overall response. Utilizing chiral periodic lattices presents a
promising avenue to significantly enhance the chiral response in lossy
materials, including but not limited to MXene, transition metal
dichalcogenides, and lossy metals.
