近日，山东师范大学的蔡阳健及其研究小组与南开大学的陈树琪等人合作并取得一项新进展。经过不懈努力，他们实现基于空间相干结构工程化的超鲁棒信息超表面。相关研究成果已于2024年6月4日在国际知名学术期刊《光：科学与应用》上发表。

据悉，光信息传输因其并发性和多维性在现代光学和光子学中占有重要地位，在光学显微镜、全息摄影、光学传感等领域有着广泛的应用。传统的光信息传输技术存在光学装置体积大、光路中遇到散射体或障碍物时信息丢失或串扰等问题。

该研究团队从理论上提出并实验上实现，对无序超表面光束相干长度和相干结构的同步操纵。通过产生具有调制相干结构的部分相干光束，即使在光传输过程中高达93%的光线被随意阻挡，也能实现超鲁棒的光信息传输和自重建。

这一突破性的成果为单超表面在鲁棒光信息传输领域带来了崭新的希望。该研究方法不仅为光子平台上的广义相干操纵提供了普适性原理，而且展现了多样化的功能，显著提升了光学信息传输的能力，特别是在无序和扰动介质中的超全息成像等方面。

附：英文原文

Title: Ultra-robust informational metasurfaces based on spatial coherence structures engineering

Author: Liu, Leixin, Liu, Wenwei, Wang, Fei, Peng, Xiaofeng, Choi, Duk-Yong, Cheng, Hua, Cai, Yangjian, Chen, Shuqi

Issue&Volume: 2024-06-04

Abstract: Optical information transmission is vital in modern optics and photonics due to its concurrent and multi-dimensional nature, leading to tremendous applications such as optical microscopy, holography, and optical sensing. Conventional optical information transmission technologies suffer from bulky optical setup and information loss/crosstalk when meeting scatterers or obstacles in the light path. Here, we theoretically propose and experimentally realize the simultaneous manipulation of the coherence lengths and coherence structures of the light beams with the disordered metasurfaces. The ultra-robust optical information transmission and self-reconstruction can be realized by the generated partially coherent beam with modulated coherence structure even 93% of light is recklessly obstructed during light transmission, which brings new light to robust optical information transmission with a single metasurface. Our method provides a generic principle for the generalized coherence manipulation on the photonic platform and displays a variety of functionalities advancing capabilities in optical information transmission such as meta-holography and imaging in disordered and perturbative media.

DOI: 10.1038/s41377-024-01485-3

Source: https://www.nature.com/articles/s41377-024-01485-3