论文标题
基于拓扑优化的等离子偏移的角度不敏感的光谱成像
Angle-insensitive spectral imaging based on topology-optimized plasmonic metasurfaces
论文作者
论文摘要
基于工程光谱调制和计算光谱重建的片上光谱成像为便携式光谱摄像机提供了有希望的方案。但是，调制单元的角度依赖性导致光谱成像的角度灵敏度，从而限制了其实际应用。在这里，我们提出了一种基于30°视野的一组拓扑优化等离子跨表面单元的设计设计，并在450至750 nm的平均极极化的450至750 nm的波长范围内展示了对角度的波长范围内的片段不敏感。此外，我们在实验上验证了制造的跨表面单元的角度不敏感的光谱滤波效应，并以98％的忠诚度展示了角度射击光谱重建。我们的方法扩大了光谱成像的应用量表，并为设计其他角度射击设备提供了指导。
On-chip spectral imaging based on engineered spectral modulation and computational spectral reconstruction provides a promising scheme for portable spectral cameras. However, the angle dependence of modulation units results in the angle sensitivity of spectral imaging, which limits its practical applications. Here, we proposed a design for angle-robust spectral recovery based on a group of topology-optimized plasmonic metasurface units under a 30° field-of-view, and demonstrate angle-insensitive on-chip spectral imaging in the wavelength range of 450 to 750 nm for average polarization. Furthermore, we experimentally verified the angle-insensitive spectral filtering effects of the fabricated metasurface units, and demonstrated angle-robust spectral reconstruction with a fidelity of 98%. Our approach expands the application scale of spectral imaging, and provides a guidance for designing other angle-robust devices.
