Nano-kirigami enabled chiral nano-cilia with enhanced circular dichroism at visible wavelengths

Abstract Nano-kirigami method enables rich diversity of structural geometries that significantly broaden the functionalities optical micro/nano-devices. However, methodologies various nano-kirigami are still limited and as a result, chiral structure has yet been pushed to limit for operation at visible wavelength region. Here, merits strategies comprehensively explored bio-inspired nano-cilia metasurface with enhanced circular dichroism wavelengths is demonstrated. The stereo designed three-fold rotational symmetry, which exhibits tuneable chiroptical responses when deformed form strong light–matter interactions. By employing electron-beam lithography (EBL) focused ion beam (FIB) lithography, on-chip metasurfaces experimentally realized in near-infrared region wavelengths, respectively, successfully validating giant revealed simulations. Our work useful existing platform micro/nano-scale manufacturing could provide an effective realization versatile bioinspired nanostructures profound responses.