Computational spectrum reconstruction based on all-dielectric metasurface and correlation selection

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-03 DOI:10.1016/j.optcom.2025.132416

Tonghui Zhao , Jing Zhu , Wei Wu , Yuting Zhang , Jianglin Chen , Lianqing Zhu

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引用次数: 0

Abstract

A computational spectrum reconstruction method in the mid-wave infrared band based on all-dielectric metasurfaces and correlation selection is proposed in this study, aiming to address the limitations of traditional spectrometers, such as large volume and the difficulty in balancing resolution and miniaturization. By designing an all-dielectric metasurface structure composed of composite circular pillars, rectangular pillars, cross-shaped pillars, and annular nanoscale pillars, and combining a greedy algorithm to screen low-correlation transmission spectra, a filter measurement matrix with a low Pearson correlation coefficient (average absolute value of 0.2104) was constructed. Non-negative least squares (NNLS) and second-order difference regularization algorithms were used for spectral reconstruction. Experimental results show that within the wavelength range of 3–5 μm, this method achieves high-precision reconstruction of single narrowband spectra (full width at half maximum of 15 nm) and biomal spectra, with a spectral resolution of 25 nm. The root-mean-square error (RMSE) for the reconstruction of 6 sets of broadband spectra is 5.407 × 10⁻³. This scheme combines compactness and high-resolution characteristics, providing a new method for miniaturized mid-wave infrared spectral analysis and portable mid-wave infrared spectral detection.

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基于全介电超表面和相关选择的计算谱重建

针对传统光谱仪体积大、分辨率和小型化难以平衡的局限性，提出了一种基于全介电超表面和相关选择的中波红外波段计算谱重建方法。通过设计由复合圆柱、矩形柱、十字形柱和环形纳米柱组成的全介电超表面结构，结合贪心算法筛选低相关透射光谱，构建了低Pearson相关系数（平均绝对值为0.2104）的滤波测量矩阵。利用非负最小二乘（NNLS）和二阶差分正则化算法进行光谱重构。实验结果表明，在3 ~ 5 μm波长范围内，该方法实现了单窄带光谱（全宽半宽为15 nm）和生物光谱的高精度重建，光谱分辨率为25 nm。6组宽带光谱重建的均方根误差（RMSE）为5.407 × 10−3。该方案结合了紧凑和高分辨率的特点，为小型化中波红外光谱分析和便携式中波红外光谱检测提供了一种新的方法。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.