可见连续波段大视场消色差单片超构表面透镜

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中图分类号：TP394.：TH69.9 文献标志码：A doi：0.3788/CO.2025-006 CSTR：327.4.CO.2025-006

Abstract： Metalenses are subject to of-axis aberrations and material dispersion， which fundamentally limit their ability to achieve both wide field-of-view （FOV） and broad operational bandwidth in imaging detection systems. In this paper，an achromatic monolayer metalens with an elongated FOV in a continuous waveband is constructed using an elaborately designed metasurface. By leveraging a quadratic phase profile for largefield-of-view （FOV） detection， the metasurface unit structure transmisson phase is subsequently optimized via particle swarm optimization （PSO） to achieve continuous band dispersion tuning. This approach consequently enables expanded operational bandwidth under wide-FOV conditions. For a monolayer metalens with a numerical aperture of O.351， an achromatic focusing field covering a ±20∘ FOV is obtained within the continuous waveband from 0.55μm to 0.65μm . The maximum focal length deviation along the optical axis is ， and the incident angle detection deviation ⩽1.34∘ . The proposed method can realize an achromatic monolayer metalens with an elongated FOV within a continuous waveband， which will have potential applications in lightweight and integrated optical imaging systems.

Key words： metalens; achromatic; large field of view

1引言

视场[1-2]和工作带宽[3-4]是成像系统的两个关键指标。（剩余13746字）