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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

Korean

중간파 적외선 (MWIR, 3-5 미크론)은 열 감지, 가스 탐지, 장거리 이미징 및 자유 공간 광 통신에 필수적입니다. 메타 광학은 전통적인 반경 광학에 대한 컴팩트하고 가볍고 잠재적으로 저렴한 대안을 제공하여 크기, 무게 및 전력 (SWaP) 구조화 시스템에 매력적입니다. 그러나, 그들의 강력한 크로마틱 분산은 크게 좁은 스펙트럼 밴드에 대한 이미징을 제한했습니다. 여기서 우리는 단일 층 실리콘 메타 표면을 사용하여 전체 3-5 미크론 MWIR 밴드에 대 한 광대역 이미징을 보여줍니다. 컴퓨팅 된 회복 시스템 (SWaP)과 함께 단일 층 실리콘 메타 표면을 사용

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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