超表面调控琼斯矩阵技术研究进展(特邀)

Research Progress of Metasurface-Based Jones Matrix Modulation(Invited)

偏振作为光场的基本自由度,在众多光学技术领域中有着十分广泛的应用。光学器件的偏振操控性能常用琼斯矩阵来表示,琼斯矩阵中可控通道数目的多少表征了对应光学器件的偏振调控能力强弱。随着光学技术的蓬勃发展,诸如偏振成像、通信编码、光学加密等前沿应用迫切需要光学器件能够独立调控多个琼斯矩阵通道,同时兼顾小型化。超表面作为由人工亚波长微结构按照特定序列排列而成的平面光学器件,天然具备集成化的优势,且对电磁波具有强大的调控能力,有望在偏振光学器件领域发挥巨大作用。从超表面的相位、振幅调控机理出发,按照可调控的通道数目从少到多对超表面调控琼斯矩阵的发展进行了系统梳理,并对超表面琼斯矩阵调控技术的未来发展进行了展望。

Polarization,a fundamental degree of freedom of the optical field,has important applications in many fields of optical technology.The optical field modulation performance of optical devices is often expressed by the Jones matrix with its number of controllable channels characterizing the polarization control capability.With the rapid development of optical technology,novel applications,such as polarization imaging,information coding,and optical encryption,require optical devices to independently modulate multiple Jones-matrix channels while considering the need for miniaturization.Metasurface,a planar optical device composed of artificial subwavelength nano-structures with specific order,is expected to have a greater role in the field of polarization optics devices owing to its natural advantage of integration and powerful ability to modulate electromagnetic waves with arbitrary customization.In this paper,we first introduce the phase and amplitude modulation mechanisms of the metasurfaces,then systematically review the development of Jones matrix modulated metasurfaces with an increase in the number of controllable channels,and finally,provide an outlook on the future development of Jones matrix modulation technology for metasurfaces.