Programmable Liquid Crystal Defects and Dynamically Manipulation with Mechanical Stress

Manual intervention in the self-assembly of soft matter to obtain a desired defect structure is a complex but significant project. Specifically, the flow and optical properties of liquid crystal (LC) materials have become the most important platform for studying topological structures in ordered physical systems. The regulation of liquid crystals (LCs) is largely limited to established means such as temperature, electric field, magnetic field, etc., however, a new effective strategy by mechanical stress is desirable but elusive. Here, using disclination controlled by stress, topologically continuous superstructure is generated to apply to touch display and wideband vector beam generator. This work demonstrates a new approach for direct controllable manipulation of disclination, unlocking the long-sought full potential of topological defect, thus paving the way for optical and dynamic applications. A new approach of soft matter external field controllable modulation by stress is developed to modulate a topological defect known as disclination. Devices are developed to realize touch displays by exploiting the structural color of high-twisted topological continuous superstructures. And utilizing the optical activity, devices are realized by micro-nano-fabrication and stress manipulate to produce modulation of a broad-band beam with a 2 pi$\pi$ continuous electric filed vector distribution. image