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Broadband Mid-Wave Infrared Imaging Enabled by All-Silicon Hyperboloid Metalens

Rose Anne Johnson, Debabrata Mandal, Zihao Zou, Jessie Wei, Anna Wirth-Singh, Vladimir Yarmolik, Johannes Froech, Arka Majumdar, Praneeth Chakravarthula · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.29841 · cited by 0 works (OpenAlex) · open-access PDF

Chinese

中波红外光(MWIR, 3-5 微米)对于热传感,气体检测,长距离成像和自由空间光学通信系统是不可或缺的。Meta-optics提供一个紧凑的,轻重的,潜在的低成本替代传统的折射光学,使它们具有吸引力,对于尺寸,重量和功率(SWaP)构建的系统。然而,它们的强大的染色分散已经大大限制成像狭窄的光谱带。在这里,我们展示了宽带成像在整个 3-5 微米 MWIR 带上,使用单层硅甲层表面结合计算重构。值得注意的是,重建模型仅采用四个图像捕获,克服了大规模的培训数据要求,并允许宽带图像恢复,尽管具有强烈的 wavelength

Machine translation (Meta M2M100); the English original follows.

Abstract

The mid-wave infrared (MWIR, 3-5 microns) is indispensable for thermal sensing, gas detection, long-range imaging, and free-space optical communications. Meta-optics offer a compact, lightweight, and potentially low-cost alternative to conventional refractive optics, making them attractive for size, weight, and power (SWaP)-constrained systems. However, their strong chromatic dispersion has largely restricted imaging to narrow spectral bands. Here, we demonstrate broadband imaging across the full 3-5 micron MWIR band using a single-layer silicon metasurface coupled with computational reconstruction. Remarkably, the reconstruction model is adapted using only four image captures, overcoming large training data requirements and enabling broadband image recovery despite the strongly wavelength-dependent optical response. In contrast to approaches that engineer complex, dispersion-optimized metalens profiles for broadband operation, our method leverages the wavelength-dependent information encoded by a simple 2cm diameter hyperboloid metalens. We show that this metasurface captures sufficient broadband intensity information for computational reconstruction across the entire MWIR band. These results establish a simple route toward broadband computational meta-optics without requiring broadband achromatic metalens designs, offering a promising platform for compact MWIR imaging systems.

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Topics: Broadband, Achromatic lens, Hyperboloid, Optics, Infrared, Physics

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