Fully polarized detection of mid-infrared broadband achromatic metalenses

Xingwei Liu; Guoguo Kang; Lingxue Wang

doi:10.1117/12.3005355

18 December 2023 Fully polarized detection of mid-infrared broadband achromatic metalenses

Xingwei Liu, Guoguo Kang, Lingxue Wang

Proceedings Volume 12960, AOPC 2023: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications; 1296007 (2023) https://doi.org/10.1117/12.3005355
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Infrared polarization technology is generally applied in object detection and analysis. However, chromatic aberration restricted the development of Infrared polarization detectors. Metalenses are two-dimensional artificial electromagnetic materials to balance chromatic aberration and an ideal platform for miniaturization and integration of infrared polarization technology. In this paper, a fully polarized detection of mid-infrared achromatic metalens is designed, with a single metalens unit diameter of 30μm, a focal length of 15μm, and a working wavelength of 3μm-5μm. Through FDTD software simulation, the results show that the metalens focuses at focal plane for any polarized state light throughout the working wavelength band, with a full width at half maximum (FWHM) of the peak of less than 6&μm, achieving achromaticity. The maximum aspect ratio of the nanopillar is 15:1, meeting the requirements of electron beam lithography processing. The designed metalens achieves full-polarization detection a wider working wavelength band comparing with existing polarization detection devices, which indicates a potential application value for mid-infrared polarization detection and imaging technology.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xingwei Liu, Guoguo Kang, and Lingxue Wang "Fully polarized detection of mid-infrared broadband achromatic metalenses", Proc. SPIE 12960, AOPC 2023: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, 1296007 (18 December 2023); https://doi.org/10.1117/12.3005355

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KEYWORDS

Polarization

Polarized light

Mid-IR

Design and modelling

Infrared technology

Infrared radiation

Metalenses

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