超表面全息术:动态显示、加密、成像及其他  

Meta⁃Holography:Dynamic Display,Encryption,Imaging,and Others

作　　者：吴泽晖 滕智琳 许可 范旭浩 王星儿 熊伟 高辉 Wu Zehui;Teng Zhilin;Xu Ke;Fan Xuhao;Wang Xinger;Xiong Wei;Gao Hui(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Optical Valley Laboratory,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,湖北武汉430074 [2]华中科技大学光学与电子信息学院,湖北武汉430074 [3]湖北光谷实验室,湖北武汉430074

出　　处：《中国激光》2024年第17期37-63,共27页Chinese Journal of Lasers

基　　金：国家自然科学基金(62205117,52275429);中国科协青年人才托举工程(2022QNRC001);国家重点研发计划(2021YFF0502700);湖北省自然科学基金(2022CFB792);湖北省创新群体项目;中国科学院西部之光项目(xbzg-zdsys-202206);武汉市知识创新专项-曙光计划项目。

摘　　要：全息术能够完整记录和再现光的波前,在众多领域中有着广泛的应用。但传统全息器件存在小视场、低分辨率和多级次串扰等缺点,限制了全息术的发展。超表面作为一种由人工亚波长结构组成的新型光学器件,具有操纵光场振幅、相位和偏振等多维物理参量的能力,在光场调控的功能与性能方面能够超越传统全息器件。介绍了超表面全息术的概念,总结了超表面全息术在显示、加密和成像等方面的应用,最后对超表面全息术未来的应用前景进行了展望。Significance Originally invented by Dennis Gabor in 1948,holography records and reconstructs the complete wavefront information of an object.In optical holography,an object beam interferes when it meets a reference beam,and the three-dimensional information of the object is recorded on a plate and a hologram is obtained.A hologram records the amplitude and phase information of light waves,and the object with three-dimensional information can be reconstructed by illuminating the hologram with coherent light.While traditional photography only stores the intensity of light and loses the phase information,a hologram contains the complete information of an object beam.Because of its powerful ability to reconstruct an arbitrary light field,holography is used in many optical fields,including three-dimensional display,encryption,data storage,and component detection.With the continuous development of computer technology and holography,the wavefront recording of holography can be realized through computer-generated holography(CGH),avoiding complex optical path and material consumption,while the developed computational holography simplifies the recording process.This technique can create holograms of virtual objects that in reality do not exist.At present,the main devices loaded with CGH are digital micromirror devices(DMDs)and liquid crystal spatial light modulators(LC-SLMs).These optical elements have large cell sizes and thicknesses owing to the limited refractive index of natural materials.The pixel size of the device is usually a few micrometers,creating shortcomings such as the small field of view,low resolution,and high-order diffraction.Therefore,it is necessary to find an optical device with a sub-wavelength size in thickness and pixel size to improve the quality of holographic imaging.In recent years,with the continuous progress of micro-and nanomanufacturing technology,metamaterials and metasurface devices with sub-wavelength structures have created new possibilities for optical device design.Metamaterials are ma

关 键 词：超表面 计算全息 显示 成像 加密 

分 类 号：TB383[一般工业技术—材料科学与工程]