Wang Shang, Lu Lidan, Zhu Lianqing
School of Instrument Science and Opto-Electronics Engineering, Beijing Information Science and Technology University, Beijing, 100192, China.
Sci Rep. 2025 Jul 1;15(1):22274. doi: 10.1038/s41598-025-06599-1.
We demonstrate a computational multispectral metasurface employing a 3×3 photonic crystal array architecture that operates across the longwave infrared spectrum (8-11.5 [Formula: see text] m). The designed structure achieves remarkable optical performance with peak transmittance reaching 75.8% and broadband energy utilization efficiency of 41.37%. Notably, the inter-channel transmittance correlation coefficient of 0.17 indicates superior spectral discrimination compared to conventional grating-based systems. We also considered the angular dependence of the array on the incident light. Additionally, to evaluate the spectral reconstruction performance of the transmission spectra under different photonic crystals, a spectral reconstruction deep learning network was constructed with the mean squared error is 2.86[Formula: see text]. This architecture establishes a hardware-algorithm co-design framework for next-generation infrared multispectral systems, demonstrating the potential for integrated superlattice detectors with sub-100 [Formula: see text] m[Formula: see text] pixel pitch, which represents a critical advancement for portable spectroscopic applications.
我们展示了一种采用3×3光子晶体阵列结构的计算多光谱超表面，其工作在长波红外光谱（8 - 11.5微米）范围内。所设计的结构实现了卓越的光学性能，峰值透过率达到75.8%，宽带能量利用效率为41.37%。值得注意的是，0.17的通道间透过率相关系数表明，与传统的基于光栅的系统相比，具有卓越的光谱分辨能力。我们还考虑了阵列对入射光的角度依赖性。此外，为了评估不同光子晶体下透射光谱的光谱重建性能，构建了一个光谱重建深度学习网络，其均方误差为2.86。这种架构为下一代红外多光谱系统建立了一个硬件 - 算法协同设计框架，展示了具有亚100微米像素间距的集成超晶格探测器的潜力，这代表了便携式光谱应用的一项关键进展。
