Centimeter‐size achromatic metalens in long‐wave infrared
Metalens has shown its significantly ultra-light and ultra-thin features. However, large-aperture achromatic metalens is constrained by both maximum dispersion range and computational memory. Here, we propose a fully device optimizing framework that engineers phase dispersion and amplitude transmittance to create centimeter-size achromatic metalens operating in long-wave infrared regime (8-12 μm). Via wrapping group delay within a defined range and optimizing dispersion phase of desired wavelengths, chromatic aberrations can be effectively corrected. We verify our design by characterizing all-silicon 3.18-cm-diameter and 6.36-cm-diameter LWIR achromatic metalenses. Diffraction-limited tight-focusing can be achieved, and the normalized focal length shift is less than 3.3 × 10<sup>-4</sup>. Thermal imaging performance is verified on targets of holes or letters with a diameter or line width exceeding 2 mm. These findings facilitate the development of large-aperture achromatic metalenses and open up possibilities for lightweight imaging systems in long-wave infrared.
Authors
- Chun Ran (ORCID: https://orcid.org/0000-0002-8302-9188)
- Xin He (ORCID: https://orcid.org/0000-0002-7757-2168)
- Fen Zhao (ORCID: https://orcid.org/0009-0006-4349-4380)
- Gangyi Zhu (ORCID: https://orcid.org/0000-0002-0109-9837)
- Yueping Zeng (ORCID: https://orcid.org/0000-0002-7370-8187)
- Junbo Yang (ORCID: https://orcid.org/0000-0003-1093-5611)
- Jiagui Wu (ORCID: https://orcid.org/0000-0003-2743-5162)
- Jie Chen (ORCID: https://orcid.org/0000-0002-9370-3965)
- Changchun Zhao
- Wangzhe Zhou
- Huan Chen (ORCID: https://orcid.org/0009-0002-0829-398X)
- Shaoqi Li
- Yuqing Zhang (ORCID: https://orcid.org/0000-0001-9915-463X)
Institutions
- Southwest University (CN)
- Chongqing University of Science and Technology (CN)
- National University of Defense Technology (CN)
- Nanjing University of Posts and Telecommunications (CN)
- Chongqing University of Technology (CN)
Publication Details
- Journal
- Nanophotonics
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1515/nanoph-2024-0716
- Citations
- 9
- Primary Topic
- Metamaterials and Metasurfaces Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.85
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Natural Science Foundation of Hunan Province
- Natural Science Foundation of Chongqing
- National Key Research and Development Program of China