Article
Nanoscience & Nanotechnology
Qian Xu, Ti Sun, Chinhua Wang
Summary: This study demonstrates achromatic imaging in the continuous broadband wavelength range with a single coded LC metalens. Both theoretical and experimental results show that the phase-coded LC lens exhibits great achromatic imaging behaviors in the visible wavelength range with a bandwidth of 134 nm and FOV of 24 degrees.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Deli Chen, Xiaohong Sun, Shuaimeng Wang, Yongle Qi, Shuai Wang, Junjie Wang
Summary: This study utilizes dielectric elliptic cylinders to design novel deflecting metasurfaces and multifunctional metalenses that can control the phase of light waves arbitrarily and achieve the conversion between left-handed circularly polarized and right-handed circularly polarized light.
OPTICAL ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Menghan Li, Muhan Liu, Yuxuan Chen, Zheng-Da Hu, Jingjing Wu, Jicheng Wang
Summary: Metasurfaces with artificial microstructures can manipulate electromagnetic waves accurately and flexibly. All-dielectric metalenses, which have a wide range of materials and low cost, offer promising applications. This study proposes an all-dielectric achromatic metalens built with Si as the structural unit, capable of operation over a broadband of wavelengths in the visible region. By controlling the wavefront of light through the Pancharatnam-Berry phase and propagation phase, chromatic aberration is eliminated. The Gerchberg-Saxton algorithm and its improved algorithm are used to optimize the holographic phases suitable for broadband, enabling achromatic broadband imaging in the visible light range for both metalenses and holographic metasurfaces.
NANOSCALE RESEARCH LETTERS
(2022)
Article
Optics
Quan Xu, Xiaoqiang Su, Xueqian Zhang, Lijuan Dong, Lifeng Liu, Yunlong Shi, Qiu Wang, Ming Kang, Andrea Alu
Summary: Metasurfaces have enabled the realization of optical functionalities on an ultrathin platform, driving the field of flat optics. Traditional metasurfaces have static meta-atoms, while reconfigurable and programmable metasurfaces offer customized functionality with individually reprogrammable meta-atoms.
ADVANCED PHOTONICS
(2022)
Article
Optics
Ziheng Qian, Shengnan Tian, Wei Zhou, Junwei Wang, Hanming Guo, Songlin Zhuang
Summary: In this study, an all-dielectric polarization-modulated broadband achromatic bifunctional metalens (BABM) is proposed, which achieves bifunctional self-compensation by applying two independent phases on the metalens. The BABM has advantages of being flexible, single-layer, convenient in manufacturing, and optical path miniaturization friendly, and will open a new page in advanced integrated optical systems.
Article
Optics
Meiyan Pan, Yifei Fu, Yujia Zang, Mengjie Zheng, Hao Chen, Xinyi He, Yanxin Lu, Yihang Chen
Summary: This research proposes a broadband, tunable transmissive metasurface based on the phase-change material GSST, which operates in the long-wave infrared spectrum. The metasurface offers design flexibility, reversible switching capability, and high-performance evaluation metrics. The feasibility of the design scheme is demonstrated through numerical simulations of two meta-devices.
Article
Optics
Tianqi Zhao, Xufeng Jing, Xiaoyan Tang, Xun Bie, Tianzi Luo, Haiyong Gan, Yingwei He, Chenxia Li, Zhi Hong
Summary: The study introduces an encoding metasurface with a three-layer C-shaped unit cell structure, which controls transmission phase and deflection angle through rotation angles, and utilizes Fourier convolution theory for flexible control.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Optics
Fuyong Yue, A. Aadhi, Riccardo Piccoli, Vincenzo Aglieri, Roberto Macaluso, Andrea Toma, Roberto Morandotti, Luca Razzari
Summary: Experimental evidence of a direct connection between high-order PB phase time evolution on the Poincare sphere and rotational Doppler frequency shift of light has been provided. This study demonstrates a new advanced way to engineer the frequency content of light through the use of a metasurface and TAM converters.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Jia-zhi Yang, Rui-zhe Zhao, Zhe Meng, Jian LI, Qing-yuan Wu, Ling-ling Huang, An-ning Zhang
Summary: Metasurface holography has significant potential for applications in optical display, optical storage, and security. This study presents a rare investigation of metasurface holography based on quantum light sources, demonstrating that quantum light sources can be effectively modulated by subwavelength structures of integrated metasurfaces. The findings expand the application scope of metasurfaces and quantum optics.
PHOTONICS RESEARCH
(2022)
Article
Physics, Applied
Yufeng Chen, Lingling Huang, Bingyi Liu, Kang An, Zengliang Li, Yongtian Wang
Summary: Metasurfaces have attracted attention for their ability to manipulate electromagnetic fields in a compact profile, but their broadband performance is limited by chromatic aberration. We propose a new kind of metalens by integrating dielectric pillars with a multi-level phase plate, achieving achromatic focusing and imaging in a specific wavelength range. We also propose a broadband achromatic meta-deflector for refracting broadband incident light.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Junyi Wang, Fangfang Li, Guoguo Kang
Summary: This study demonstrates a simple method using a metasurface to achieve multiwavelength achromatic generation and focusing. By utilizing the extra degrees of freedom and multi-section design, multiwavelength achromatic super-resolution focusing in the far field has been achieved.
Article
Optics
Hongchuan He, Guangbin Dai, Hao Cheng, Yangkai Wang, Xiangyu Jia, Ming Yin, Qiuping Huang, Yalin Lu
Summary: Active phase-control metasurfaces have been developed for manipulating light propagation. This paper presents a phase controlled metastructure based on circular split ring resonators made of silicon and gold. The metastructure allows continuous and active control of the Pancharatnam-Berry phase, enabling various applications such as light deflection, reconfigurable metalens, and achromatic metalens. Experimental results demonstrate successful active control of the metalens focal spots. This metastructure offers a promising approach for active light manipulation.
Article
Optics
Mingfeng Xu, Mingbo Pu, Di Sang, Yuhan Zheng, Xiong Li, Xiaoliang Ma, Yinghui Guo, Renyan Zhang, Xiangang Luo
Summary: Topology optimization of geometric phase metasurfaces was investigated for wide-angle and high-efficiency deflection using an adjoint-based multi-object optimization approach. The optimized metasurfaces showed significant improvements in absolute efficiency, transitioning from discrete structures to quasi-continuous arrangements. Catenary-like structures were found to be superior to discrete geometric phase metasurfaces through numerical optimization.
Article
Physics, Multidisciplinary
Ze-Guo Chen, Ruo-Yang Zhang, C. T. Chan, Guancong Ma
Summary: This study demonstrates the realization of non-Abelian braiding of multiple degenerate acoustic waveguide modes, exploring the dynamics and geometric phase variations. By switching the order of different braiding processes, the non-Abelian characteristics are revealed.
Article
Nanoscience & Nanotechnology
Jixiang Cai, Fei Zhang, Mingbo Pu, Yan Chen, Yinghui Guo, Ting Xie, Xingdong Feng, Xiaoliang Ma, Xiong Li, Honglin Yu, Xiangang Luo
Summary: This research verifies that chiral meta-atoms with high-fold rotational symmetries can produce the generalized PB phase. The use of an all-metallic configuration improves efficiency and bandwidth, and the performance is analyzed using an equivalent air waveguide. Four metadevices are experimentally demonstrated with a maximum efficiency exceeding 83%.