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| 1 | Integrated-resonant metadevices:a review显示文摘Integrated-resonant units(IRUs),associating various meta-atoms,resonant modes,and functionalities into one supercell,have been promising candidates for tailoring composite and multifunctional electromagnetic responses with additional degrees of freedom.Integrated-resonant metadevices can overcome many bottlenecks in conventional optical devices,such as broadband achromatism,efficiency enhancement,response selectivity,and continuous tunability,offering great potential for performant and versatile application scenarios.We focus on the recent progress of integrated-resonant metadevices.Starting from the design principle of IRUs,a variety of IRU-based characteristics and subsequent practical applications,including achromatic imaging,light-field sensing,polarization detection,orbital angular momentum generation,metaholography,nanoprinting,color routing,and nonlinear generation,are introduced.Existing challenges in this field and opinions on future research directions are also provided. | Jin Yao Rong Lin Mu Ku Chen Din Ping Tsai | 2023 | Advanced Photonics2023，5，2： | 3 |
| 2 | Phase characterisation of metalenses显示文摘Metalenses have emerged as a new optical element or system in recent years,showing superior performance and abundant applications.However,the phase distribution of a metalens has not been measured directly up to now,hindering further quantitative evaluation of its performance.We have developed an interferometric imaging phase measurement system to measure the phase distribution of a metalens by taking only one photo of the interference pattern.Based on the measured phase distribution,we analyse the negative chromatic aberration effect of monochromatic metalenses and propose a feature size of metalenses.Different sensitivities of the phase response to wavelength between the Pancharatnam-Berry phase-based metalens and propagation phase-reliant metalens are directly observed in the experiment.Furthermore,through phase distribution analysis,it is found that the distance between the measured metalens and the brightest spot of focusing will deviate from the focal length when the metalens has a low nominal numerical aperture,even though the metalens is ideal without any fabrication error.We also use the measured phase distribution to quantitatively characterise the imaging performance of the metalens.Our phase measurement system will help not only designers optimise the designs of metalenses but also fabricants distinguish defects to improve the fabrication process,which will pave the way for metalenses in industrial applications. | Maoxiong Zhao Mu Ku Chen Ze-Peng Zhuang Yiwen Zhang Ang Chen Qinmiao Chen Wenzhe Liu Jiajun Wang Ze-Ming Chen Bo Wang Xiaohan Liu Haiwei Yin Shumin Xiao Lei Shi Jian-Wen Dong Jian Zi Din Ping Tsai | 2021 | Light(Science & Applications)2021，10，4： | 1 |
| 3 | Electromagnetic Wave Tailoring:From One Dimension to Multiple Dimensions显示文摘Metasurfaces,known as arrays of subwavelength antennas,provide a wide range of options for controlling electromagnetic waves and effectively reducing the size and complexity of electromagnetic devices.Metasurfaces can manipulate five degrees of freedom of electromagnetic waves:amplitude,wavelength,polarization,phase,and orbital angular momentum;these are customized to provide a variety of remarkable functionalities,including metalenses and meta-holograms.With the advancement of simultaneously manipulating two or more degrees of freedom of the electromagnetic field,there has been a significant increase in the amount of information that electromagnetic waves can carry.The wavefront can be precisely tailored for specific applications,facilitating new possibilities for innovative applications with high performance and diverse functionalities,such as full-color vectorial meta-holograms achieved by a single-layer metasurface.This review briefly overviews the latest developments in metasurfaces,categorizing them based on their various degrees of freedom used to manipulate the electromagnetic waves.The use of metasurfaces to control electromagnetic waves from one dimension to multiple dimensions is systematically explored.The challenges and opportunities for future research are discussed. | Jing Cheng Zhang Geng-Bo Wu Mu Ku Chen Xiaoyu Che Yao Liang Din Ping Tsai Chi Hou Chan | 2023 | Electromagnetic Science2023，1，3： | 1 |
| 4 | Miniature tunable Airy beam optical meta-device显示文摘Tunable Airy beams with controllable propagation trajectories have sparked interest in various fields,such as optical manipulation and laser fabrication.Existing research approaches encounter challenges related to insufficient compactness and integration feasibility,or they require enhanced tunability to enable real-time dynamic manipulation of the propagation trajectory.In this work,we present a novel method that utilizes a dual metasurface system to surpass these limitations,significantly enhancing the practical potential of the Airy beam.Our approach involves encoding a cubic phase profile and two off-axis Fresnel lens phase profiles across the two metasurfaces.The validity of the proposed strategy has been confirmed through simulation and experimental results.The proposed meta-device addresses the existing limitations and lays the foundation for broadening the applicability of Airy beams across diverse domains,encompassing light-sheet microscopy,laser fabrication,optical tweezers,etc. | Jing Cheng Zhang Mu Ku Chen Yubin Fan Qinmiao Chen Shufan Chen Jin Yao Xiaoyuan Liu Shumin Xiao Din Ping Tsai | 2024 | Opto-Electronic Advances2024，7，2： | 0 |
| 5 | Metalenses for revolutionary imaging显示文摘Imaging tasks are becoming increasingly complex due to continuous high-tech advancements and the proliferation of personal electronics.From the high-resolution displays on our smartphones and laptops to advancedmedical imaging systems,imaging systems are constantly being pushed to their limits.As complexity increases,more advanced optics are required. | Mu Ku Chen Takuo Tanaka | 2023 | Photonics Insights2023，2，1： | 0 |
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