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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

Japanese

中波赤外線(MWIR、3〜5マイクロン)は熱感知、ガス検出、長距離イメージング、およびフリースペース光学通信に不可欠です。メタ光学は、コンパクト、軽量、および潜在的に低コストの従来の反射光学に代替を提供し、それらをサイズ、重量、およびパワー(SWaP)構造システムのための魅力的です。しかし、彼らの強力なクロマティック分散は、幅広いスペクトラル帯に幅広いイメージングを大いに制限しています。ここでは、我々は、単一層のシリコンメタス表面とコンピュータの再構築(SWaP)を使用して完全な3〜5マイクロンMWIR帯に幅広いスペクトラ

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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