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() Parallel bright-field and multi-order edge imaging via wide field-of-view trichannel metalens
Xiaotong Li 李小桐 ¹, Yeseul Kim ¹, Youngsun Jeon ¹, Junhwa Seong ¹, Jaekyung Kim ¹, Peng Tang 唐鹏 ¹, Shiqi Hu 胡示骐 ¹, Harit Keawmuang ¹, Beomha Yang ², Dongmin Jeon ¹, Le Dai 代乐 ³, Weiyan Li 李卫岩 ⁴ ⁵, Xiaodong Cai 蔡晓东 ⁶, Jinhui Shi 史金辉 ⁴ ⁵, Yong-Sang Ryu ⁷, Trevon Badloe ⁸ ⁹, Junsuk Rho 鲁埈锡 ¹ ² ³ ¹⁰ ¹¹ ¹²
¹ Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
² Quantum Information Science Program, Graduate School of Convergence Science and Technology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
³ Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
⁴ Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
中国 哈尔滨 哈尔滨工程大学物理与光电学院 纤维集成光学教育部重点实验室
⁵ Key Laboratory of Photonic Materials and Devices Physics for Oceanic Applications, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
中国 哈尔滨 哈尔滨工程大学物理与光电学院 海洋光子材料与器件物理实验室
⁶ Thin Film Optics R&D Center, Department of High-power Laser Optics Technology and Engineering, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
中国 上海 中国科学院上海光学精密机械研究所 高功率激光元件技术与工程部 薄膜光学研发中心
⁷ School of Biomedical Engineering, Korea University, Seoul 02841, Republic of Korea
⁸ Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
⁹ Digital Healthcare Center, Sejong Institute for Business and Technology, Korea University, Sejong 30019, Republic of Korea
¹⁰ Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
¹¹ POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics, Pohang 37673, Republic of Korea
¹² National Institute of Nanomaterials Technology (NINT), Pohang 37673, Republic of Korea
Opto-Electronic Advances , 2026-07-10
https://doi.org/10.29026/oea.2026.250306
https://www.oejournal.org/oea/article/doi/10.29026/oea.2026.250306
Abstract

Modern optical systems require the capability to perform multi-functional and parallel imaging within compact, integrated architectures. However, conventional refractive lenses are bulky, restricted to single-mode operation, and incompatible with planar integration. In this work, we propose a trichannel metalens capable of simultaneously performing bright-field imaging, first-order edge detection, and second-order edge detection over a wide field-of-view (FOV).

Specifically, by encoding combinations of input-output circular polarization, different functions are independently realized in three channels, and the spin-dependent gradient phase is employed to spatially separate them, ensuring that all three functions can be simultaneously captured under linearly polarized illumination, without necessitating mode switching or additional optical components.

Experimental results show that the proposed metalens can parallelly provide three independent imaging functions with clear spatial separation and stable performance over a FOV ranging from −10° to 10°. Our approach offers a promising path toward compact, integrated imaging systems for biomedical imaging, real-time edge analysis, and machine vision applications.
Parallel bright-field and multi-order edge imaging via wide field-of-view trichannel metalens_1
Parallel bright-field and multi-order edge imaging via wide field-of-view trichannel metalens_2
Parallel bright-field and multi-order edge imaging via wide field-of-view trichannel metalens_3
Parallel bright-field and multi-order edge imaging via wide field-of-view trichannel metalens_4
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