近日，苏州大学徐亚东团队研究了经由相位梯度超表面的错觉光学。该研究于2026年1月13日发表在《球探体育比分:物理快报》杂志上。

光学相位梯度超表面凭借其对光场的灵活调控能力，在多领域应用中受到广泛关注。

研究组证明，相位梯度调制的超表面能够实现幻象光学效应，与经典的变换光学方法相比具有几何结构简单、易于实现的优势。其物理机制源于相位梯度引发的异常衍射定律，这为自由操控光的传播路径提供了理论基础。通过具体示例，研究组将展示相位梯度可将真实空间的空间坐标映射至幻象空间，从而使真实空间中的平面结构在幻象空间中呈现曲面形态，实现幻象效果。该方法为设计幻象器件提供了替代变换光学的可行途径。

附：英文原文

Title: Illusion Optics via Phase-Gradient Metasurfaces

Author: Zhaoyao Pan, Jinpeng Yang, Yadong Xu

Issue&Volume: 2026-01-13

Abstract: Optical phase-gradient metasurfaces have garnered significant attention for enabling flexible light manipulation, with applications across diverse domains. In this work, we will demonstrate that the metasurfaces with phase gradient modulation can be used to achieve illusion optics, featuring the advantages of simple geometric structure and feasible implementation compared with the well-known transformation optics method. The underlying mechanism is the anomalous diffraction law caused by the phase gradient, which provides a theoretical basis for freely manipulating the propagation path of light. By considering a specific example, we will demonstrate that the phase gradient can transform spatial coordinates in real space into illusion space, thereby converting a plane in real space into a curved surface structure in illusion space to achieve the illusion effect. This approach provides a viable alternative to transformation optics for designing illusion devices.

DOI: 10.1088/0256-307X/43/1/010401

Source: https://cpl.iphy.ac.cn/article/doi/10.1088/0256-307X/43/1/010401