Holographic Resonant Laser Printing of flat optics using template plasmonic metasurfaces

The science and technology of metasurfaces is flourishing in recent years, and promising applications are now emerging. One of the encouraging directions is that of the resonant digital laser printing, allowing to generate structural colors with unprecedented spatial resolution of over 100,000 DPI. Here, we advance this concept further by introducing the method of holographic resonant digital laser printing. With this approach we project a hologram on a substrate consisting of nanoscale resonant structures. Owing to the strong field enhancement of the nanoscale antenna array, it is now possible to project a full image onto the resonant media and spatially modify its transmission function. In spite of the fact that the holographic imaging system is diffraction limited, the resolution is still determined by the size of the individual nano-resonator element owing to the nonlinear threshold for morphology changes and ablation. Following the demonstration of the approach we have also validated its usefulness by the fabrication of various flat optics elements, e.g. flat lenses, axicons as well as decorative images. We have characterized the fabricated lenses at different operational wavelength and observed a good focusing capability, close to the diffraction limit. The demonstrated approach paves the way for the construction of diverse planar optics devices over a large area. Owing to its great flexibility it may also facilitate the construction of multifunctional components on the same substrate.