Fig. 1. Geodesic lens of micron scale[29]. (a) Spatial distribution of refractive index of four kinds of geodesic lenses and actual shapes of geodesic lenses; (b) sample morphology and coupled grating morphology under electron microscope; (c) beam propagation and comparison with theoretically calculated trajectory
Fig. 2. Conformal singularity experiment[30]. (a) Refractive index distribution of core region and whole, and corresponding curved surface shape; (b) refractive index distribution of zero singularity core area and whole, and corresponding curved surface shape; (c) infinite singularity and zero optical simulation results of ingularity; (d) curved waveguide samples of infinite singularities and experimental images of beam propagation
Fig. 3. Conformal lens experiment[31]. (a) Schematic of beam with multi-curved structure and corresponding refractive index distribution in virtual space; (b) convergence diagram of quasi-focusing curved lens and corresponding plane refractive in dex distribution diagram; (c) sample photos and experimental pictures of non-rotationally symmetric curved lens-like lenses