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Abstract Wavefront control is the fundamental requirement in optical informatics. Planar optics have drawn intensive attention due to the merits of compactness and light weight. However, it remains a challenge to freely manipulate the dispersion, hindering practical applications, especially in imaging. Here, we propose the concept of frequency-synthesized phase engineering to solve this problem. A phasefront-frequency matrix is properly designed to encode different spatial phases to separate frequencies, thus makes arbitrary dispersion tailoring and even frequency-separated functionalization possible. The periodically rotated director endows cholesteric liquid crystal with a spin and frequency selective reflection. Moreover, via presetting the local initial orientation of liquid crystal, geometric phase is encoded to the reflected light. We verify the proposed strategy by cascading the chiral anisotropic optical media of specifically designed helical pitches and initial director orientations. By this means, planar lenses with RGB achromatic, enhanced chromatic aberration and color routing properties are demonstrated. Inch-sized and high-efficient lenses are fabricated with low crosstalk among colors. It releases the freedom of dispersion control of planar optics, and even enables frequency decoupled phase modulations. This work brings new insights to functional planar optics and may upgrade the performance of existing optical apparatuses.

The intrinsic limitation of single spin-selective Pancharatnam-Berry phase in common chiral anisotropic media has been broken by a refilled polymer network with opposite chirality and delicate photo-patterned superstructures.

A multi-component mixed acid was prepared by simulating the composition of exhaust gas recirculation condensate, and the effects of the multi-component mixed acid solution on the mechanical properties, apparent morphology and thermal stability of silicone rubber, fluororubber and ethylene-acrylate rubber were investigated. The results showed that after corrosion, the mechanical properties and surface morphology of fluororubber and ethylene-acrylate rubber remained good, while cracks appeared on the surface of silicone rubber and its tensile strength and elongation at break decreased significantly by 86.6% and 90.3%, respectively. Thermal stability of fluororubber remained good, while the initial decomposition temperature of ethylene-acrylate rubber and silicone rubber increased.