Ms. Mizhen Wang Profile

Mizhen Wang

at Xidian Univ

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Proceedings Article | 30 January 2019 Paper

Characteristics of a mid-wavelength infrared metalenses integrated imaging system

Xin Wu, Mizhen Wang

Proceedings Volume 10841, 108411B (2019) https://doi.org/10.1117/12.2506832

KEYWORDS: Mid-IR, Infrared imaging, Imaging systems, Infrared radiation, Finite-difference time-domain method, Diffraction, Lenses, Sensors, Infrared sensors

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Metalenses highlight the potential of planar optics and can respond to the growing demand for miniaturization of conventional imaging lenses in portable and wearable electronic devices, computer vision, and microscopy. This paper characterized a set of mid-wavelength infrared (MWIR) metalenses operating at 4 μm. We derived the radius distribution of the nanopillar at each position based on rigorous coupled-wave analysis, then the metalenses were simulated with focal length f =14 μm and a total of 121 nanopillars by FDTD. Experimental results indicated that the focal spot size of the MWIR metalenses was close to the diffraction limit, and the field of view was as large as 50°. Most importantly, images captured by the MWIR metalenses had a comparable quality to the one by a conventional lens, while metalenses have the advantages of a smaller footprint and negligible weight, making them attractive for further deployment.

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