多维度超表面计算全息术的机理、方法及器件研究

Metasurfaces have the characteristics such as special responses to the polarization state and wavelength of an incident light beam. Besides, they provide advantages such as broad space extension and accurate phase manipulation. Based on optical elements and devices formed by metasurfaces, one can manipulate an incident light beam much better than ever before. In this project, we plan to study the principles of holographic information multiplexing and phase manipulation based on optical metasurfaces, and then develop a new-conceptual computer generated holography with multi-dimensional information. Pointing at this target, we plan to start to investigate the characteristics of optical metasurfaces at first. By building up the theoretical model of the interaction between metasurfaces and the electromagnetic fields, we plan to explore the principles and methods that metasurfaces are applied in holographic information multiplexing and phase modulation. With such study, we can design the nanostructures of metasurfaces and then form multi-dimensional holograms. The beam propagation model, evaluation method, analysis and measuring method should be investigated in detail. After that, the algorism to design multi-dimensional holograms, fabrication procedures and applications should be studied. With this project, the lightwave manipulation principles and methods for multi-channel information transmission based on metasurfaces can be realized. In applications, it can provide a new way to improve the capacity of holographic information and is promising in body motion sensing, optical storage, quantum telecommunications, holographic display, information security and many other potential fields.

超表面材料不仅具有独特的偏振和波长响应特性，同时兼备广阔的空间拓展能力和精密的相位操控能力。基于此材料打造的光学元器件，对光波的操控能力有望被提升至新高。项目拟深入开展超表面材料实现信息复用和相位调控的机理研究，并据此发展一种多维度的新概念计算全息术。基于此目标，项目拟从光学超表面材料的特性研究入手，通过建立超表面材料与光波电磁场相互作用的理论模型，探索其应用于多维度全息信息复用和相位操控的机制和方法，优化出可用的超表面微纳结构；基于超表面材料打造多维度全息器件，建立全息器件的光束传输模型、评价体系和分析测试手段；研究多维度全息器件的优化设计方法、工艺制备和器件应用。项目理论上可厘清超表面材料实现多通道信息同步传递的机理和方法，应用上可为全息信息容量的提升提供一种全新的技术手段，并有望在体感全息、光存储、量子通信、全息显示、信息安全等领域得到重要的应用。

微纳结构超表面材料具有几何形状、方位角、排布方式、叠层等多种设计自由度，为多维度超表面计算全息术的研发提供了重要契机。本项目从光学超表面材料的光波操控特性研究入手，通过建立超表面材料与光波电磁场相互作用的理论模型，发现了微纳结构的转角简并性原理，探索出多种全息信息复用的新机制和新方法，研发出多种新概念、多维度全息光学器件，包括：近远场复用多功能全息片、偏振复用全息片、纳米印刷与全息术融合的多功能器件、全空间随机光点云发生器等。建立了多维度全息器件的光束传输模型、评价体系和分析测试手段，完成了超表面材料的高精度工艺制备和表征，完成多维度超表面计算全息术的理论设计和技术平台建设工作。研究过程中，在包括Science Advances、Advanced Materials、Nano Letters、ACS Nano、Light: Science & Advances等在内的国际权威期刊上发表期刊论文38篇(其中SCI论文33篇)，申请国家发明专利66件，已授权发明专利51件，相关研究成果在光纤通信、光传感等诸多领域得到应用。