Meta-fibers: merging nanophotonics and fiber optics via 3D nanoprinting for taylored beam manipulation

Here, we will demonstrate how the fusion of optical fibers with nanostructures creates a new category of fiber-integrated devices – meta-fibers – that unlocks novel applications. We achieve this by leveraging 3D nanoprinting, which is highly compatible with the fiber geometry, to integrate high-NA holographic meta-lenses, achromatic metasurface-based lenses, and dielectric ring-like gratings onto the end faces of single-mode fibers, allowing to trap biological relevant objects, to focus light across the telecommunication range, and to boost incoupling efficiencies.