Switchable Bright‐Field Imaging and Corner Detection with an Electrically Tunable Metalens

Peng Tang; Youngsun Jeon; Xiaotong Li; Yeseul Kim; Junhwa Seong; Shiqi Hu; Kyungtae Kim; Guoqiang Li; Trevon Badloe; Junsuk Rho

doi:10.1002/adom.202500981

journal article·2025-08Open access

Switchable Bright‐Field Imaging and Corner Detection with an Electrically Tunable Metalens

Peng Tang, Youngsun Jeon, Xiaotong Li, Yeseul Kim, Junhwa Seong, Shiqi Hu, Kyungtae Kim, Guoqiang Li, Trevon Badloe, Junsuk Rho

Advanced Optical Materials· Volume 13· Issue 22

Publisher page Open full text

Source abstract

Abstract

Abstract Traditional corner detection methods are typically based on digital techniques. In this work, a metalens is cascaded with a liquid crystal device to rapidly switch between bright‐field imaging and corner detection modes in an optical device. Specifically, a conventional hyperbolic mode under left‐circularly polarized incidence is employed for bright‐field imaging and a focused second‐order vortex mode under right‐circularly polarized incidence for corner detection. At corner regions, overlapping double‐line edges form dual corner, and their center corresponds to the original corner in the image, serving as the basis for the detection mechanism. The tunable metalens offers a versatile and efficient platform for multifunctional optical imaging, with promising applications in defect detection, target recognition, and image matching.

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Research context

OpenAlex topics: Metamaterials and Metasurfaces Applications · Advanced Memory and Neural Computing · Plasmonic and Surface Plasmon Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for High Efficiency Energy Conversion Science and Technology of Henan Province School of Physics and Electronics Henan University Kaifeng 475004 PR China

International Joint Laboratory of New Energy Materials and Devices of Henan Province School of Physics and Electronics Henan University Kaifeng 475004 PR China

Department of Mechanical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Department of Electronics and Information Engineering Korea University Sejong 30019 Republic of Korea

Division of Smart Energy Convergence Engineering Korea University Sejong 30019 Republic of Korea

Department of Chemical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

POSCO‐POSTECH‐RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang 37673 Republic of Korea

National Institute of Nanomaterials Technology (NINT) Pohang 37673 Republic of Korea

Funding

National Research Foundation of Korea · Samsung

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