Article
Nanoscience & Nanotechnology
Weikang Pan, Zhuo Wang, Yizhen Chen, Shiqing Li, Xiaoying Zheng, Xinzhang Tian, Cong Chen, Nianxi Xu, Qiong He, Lei Zhou, Shulin Sun
Summary: A new strategy is proposed to efficiently generate arbitrary spin-polarized scattering far-field patterns from surface-wave (SW) excitations on a designer Pancharatnam-Berry (PB) metasurface. PB meta-atoms serve as subwavelength scatter to decouple impinging SW to spin-polarized propagating waves (PW), and interference among PWs generated by scatterings at different PB meta-atoms can generate tailored far-field patterns. Designed PB metasurfaces in the microwave regime can generate desired radiation patterns within a broad frequency band, including unidirectional radiation, line/point focusing, vortex beam, and hologram.
Article
Optics
Jixiang Cai, Fei Zhang, Mingbo Pu, Ting Xie, Xingdong Feng, Honglin Yu, Xiangang Luo
Summary: This paper proposes all-metallic reflective metasurfaces with S-shape streamline structures to achieve the photonic spin-Hall effect with high conversion efficiency and bandwidth. Experimental results demonstrate the effectiveness of this structure and its potential applications in high-efficiency electromagnetic components and optics.
Article
Optics
Xinjian Lu, Xiaoyin Li, Yinghui Guo, Mingbo Pu, Jiangyu Wang, Yaxin Zhang, Xiong Li, Xiaoliang Ma, Xiangang Luo
Summary: This paper proposes a method to achieve broadband high-efficiency polarization-multiplexing using a geometric phase polymerized liquid crystal metasurface, allowing for polarization-switchable functionalities. By designing broadband high-efficiency polymerized liquid crystal metalenses, spin-controlled behavior is obtained and experimental results demonstrate stable and excellent optical performance. The low-cost polymerized liquid crystal metasurfaces enable large-scale patterning and have unrivalled advantages in terms of low waveguide absorption.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Zezhao Ju, Jing Wen, Lina Shi, Binbin Yu, Ming Deng, Dawei Zhang, Weiming Hao, Jian Wang, Shuqi Chen, Lin Chen
Summary: Conventional methods for generating Airy beams are limited by bulky and costly systems, but a new design strategy utilizing the high birefringence and transmission efficiency of dielectric metasurfaces allows for the construction of a broadband and high-efficiency transmissive Airy optical beam generator. Experimental verification of this method demonstrates its effectiveness and showcases the unique characteristics of Airy beams.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Physics, Applied
Shaohua Dong, Shiqing Li, Xiaohui Ling, Guangwei Hu, Yi Li, Hongyi Zhu, Lei Zhou, Shulin Sun
Summary: This study introduces a high-efficiency and broadband spin-unlocked metasurface by combining the resonance phase and the geometric phase mechanisms. The design is achieved by changing one geometric parameter instead of multi-parameter optimization. Experimental results demonstrate the anomalous photonic spin Hall effect and completely independent wavefront manipulations achieved by the spin-unlocked metasurface.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Xinbo Chen, Cheng An, Jianyang Zhou, Weiwen Li
Summary: A broadband spin-decoupled metasurface is proposed to regulate dual circularly polarized waves independently. An equivalent circuit model is established to relate reflection coefficients and structural parameters, and meta-atoms are designed based on this model to form a 3-bit coding metasurface. Experimental measurements confirm the effectiveness of this methodology for metasurface design.
Article
Chemistry, Analytical
Bruno Ferreira-Gomes, Osvaldo N. Oliveira, Jorge Ricardo Mejia-Salazar
Summary: The design of a low-profile integrated millimeter-wave antenna for efficient and broadband circularly polarized electromagnetic radiation is reported. The antenna uses a chiral dielectric metasurface to achieve high-gain and wide axial ratio bandwidth, which outperforms previous designs in terms of compactness and performance. Simulation results show promise for integrating circularly polarized antennas based on chiral metasurfaces into 5G and satellite communications.
Article
Materials Science, Multidisciplinary
Zheng Xing Wang, Jun Wei Wu, Liang Wei Wu, Yue Gou, Hui Feng Ma, Qiang Cheng, Tie Jun Cui
Summary: This work introduces bilayer information metasurfaces to achieve polarization-encoded holograms in the microwave regime. The metasurfaces consist of 3-bit spin-decoupled meta-atoms with ultrathin profiles and high cross-polarization transmittance. A novel algorithm is proposed to generate coding sequences for different functionalities of corresponding circularly polarized channels. The maximum imaging efficiency can reach up to 65.1%, demonstrating the high efficiency of this holographic technology.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jack Hu, Fareeha Safir, Kai Chang, Sahil Dagli, Halleh B. Balch, John M. Abendroth, Jefferson Dixon, Parivash Moradifar, Varun Dolia, Malaya K. Sahoo, Benjamin A. Pinsky, Stefanie S. Jeffrey, Mark Lawrence, Jennifer A. Dionne
Summary: Genetic analysis methods are crucial for personalized medicine, disease diagnostics, and ecosystem monitoring. This study presents a label-free genetic screening platform using high-Q silicon nanoantennas, enabling quantitative and specific detection of gene fragments with femtomolar sensitivity within 5 minutes. The highly-multiplexed detection potential and amplification-free nature of this technology provide a foundation for rapid molecular assays.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Lingxi Huang, Yuping Duan, Yupeng Shi, Huifang Pang, Qingwen Zeng, Renchao Che
Summary: In this paper, a revolutionary concept of C-doped FeCoNiSiAl high-entropy-alloy (HEA) ribbons with hierarchical nanostructures is proposed to induce superior soft magnetization and absorption. The hierarchical nanostructures result in low coercivity and conductivity, supporting loss effect and impedance matching. The metasurfaces fabricated with HEA ribbons exhibit strong absorption and effective broadband absorption, thanks to the strong magnetic coupling.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Optics
Shuai Lin, Hao Luo, Hainan He, Hongchen Chu, Yun Lai
Summary: In this work, broadband binary-reflection-phase metasurfaces with undistorted transmission wavefront are realized by leveraging mirror symmetry in the metasurface design. The cross-polarized reflection can be flexibly manipulated without distorting the wavefront in transmission by designing the binary-phase pattern induced in the cross-polarized reflection. The experimental validation of reflected-beam splitting and undistorted transmission wavefront in a broad bandwidth from 8 GHz to 13 GHz is presented.
Article
Engineering, Electrical & Electronic
Xiao-Feng Li, Guang-Ming Wang, Xiao-Jun Zou, Tang-Jing Li, Tong Cai
Summary: A novel design of compact and low-profile broadband circularly polarized folded transmitarray antenna (CPFTA) is reported in this study. The antenna utilizes a broadband linear-to-circular polarization conversion metasurface (PCM) and a linear-to-linear PCM to achieve efficient polarization conversion. Experimental results demonstrate a wide impedance bandwidth, gain bandwidth, and axial ratio bandwidth. With its advantages of broadband operation, flat gain, and ease of integration, the proposed CPFTA is a promising candidate for modern wireless communications.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yue Gou, Hui Feng Ma, Liang Wei Wu, Zheng Xing Wang, Peng Xu, Tie Jun Cui
Summary: In this study, a novel Pancharatnam-Berry (PB) coding metasurface composed of spin-decoupled elements is proposed to achieve broadband spin-selective reflections with arbitrary wavefront manipulations. The designed metasurface efficiently reflects the designated circularly polarized wave without reversing the spin state, while suppressing its orthogonally polarized wave through random diffusion. Both simulation and experiment results demonstrate the metasurface's chiral-like characteristics despite being composed of nonchiral meta-elements.
Article
Engineering, Electrical & Electronic
Ashif A. Fathnan, Toufiq M. Hossain, Dadin Mahmudin, Yusuf Nur Wijayanto, David A. Powell
Summary: This study reports the characterization of an achromatic focusing metasurface at oblique incident angles. It is found that in addition to off-axis aberrations caused by the hyperbolic phase profile, the focusing performance is significantly degraded due to angular dispersion of the meta-atoms. Point dipole models are used to investigate the relationship between the angular and spectral bandwidth of meta-atoms and the metasurface focusing performance. It is confirmed that the angular dispersion is the dominant mechanism in determining off-axis aberrations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Review
Multidisciplinary Sciences
Vasileios G. Ataloglou, Sajjad Taravati, George Eleftheriades
Summary: The increasing number of wireless devices has led to a crowded spectrum and increased demand for versatile wireless apparatuses. Metasurfaces have emerged as a technological solution to the spectrum scarcity problem by opportunistically sharing the spectrum. This article overviews passive and dynamic metasurfaces and shows their potential to enhance wireless communication systems through real-time signal coding, nonreciprocal beam radiation, nonreciprocal beamsteering amplification, and advanced pattern-coding multiple access communication.
NATIONAL SCIENCE REVIEW
(2023)
Article
Optics
Chenxi Pu, Zhuo Wang, Shulin Sun, Lei Zhou, Qiong He
Summary: This study presents the design and fabrication of a multilayer metasurface-based microwave transmissive angle-multiplexed meta-polarizer, which exhibits distinct angle-dependent transmissive responses under different polarizations. The experimental results are well-matched with numerical simulations and theoretical analyses.
CHINESE OPTICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhuo Wang, Yao Yao, Weikang Pan, Haoyang Zhou, Yizhen Chen, Jing Lin, Jiaming Hao, Shiyi Xiao, Qiong He, Shulin Sun, Lei Zhou
Summary: In this study, a set of dielectric metasurfaces are designed and fabricated to achieve efficient spin-multiplexed wavefront controls on THz waves based on high aspect-ratio silicon micropillars. Experimental demonstrations show a record high absolute efficiency of 92% for the photonic-spin-Hall-effect using a dielectric metasurface encoded with geometric phases only. Spin-multiplexed controls on circularly polarized THz beams, such as anomalous refraction and focusing, are also experimentally demonstrated with an efficiency of 88% using a dielectric meta-device encoded with both spin-independent resonant phases and spin-dependent geometric phases. This study paves the way for the realization of multifunctional, high-performance, and ultra-compact THz devices for applications in biology sensing, communications, and more.
Article
Optics
Feifei Liu, Dongyi Wang, Han Zhu, Xiyue Zhang, Tong Liu, Shulin Sun, Xinping Zhang, Qiong He, Lei Zhou
Summary: A generic approach for designing plasmonic lenses to generate predesigned vector surface plasmon polaritons (SPPs) vortices with high efficiencies is established. The devices, constructed with tailored meta-atoms, can convert normally incident circularly polarized light into desired vector SPP vortices due to phase and polarization matching. Experimental demonstrations of directional SPP conversion (coupling efficiency: 35%; utilization efficiency: 98%) and enhanced efficiency in generating vector SPP vortex pave the way for on-chip plasmonic devices to efficiently utilize SPPs with minimal footprints.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Yizhen Chen, Xiaoying Zheng, Xiyue Zhang, Weikang Pan, Zhuo Wang, Shiqing Li, Shaohua Dong, Qiong He, Feifei Liu, Lei Zhou, Shulin Sun
Summary: This study establishes a new scheme for realizing highly miniaturized couplers to efficiently excite on-chip photonic devices. By utilizing both resonant and Pancharatnam-Berry mechanisms, the meta-device can couple circularly polarized light to a surface plasmon and focus it onto a target on-chip device. Experimental results demonstrate the high efficiency of this scheme in exciting on-chip waveguides and dual-waveguide systems.
Article
Nanoscience & Nanotechnology
Weikang Pan, Zhuo Wang, Yizhen Chen, Xiaoying Zheng, Shiqing Li, Xinzhang Tian, Qiong He, Lei Zhou, Shulin Sun
Summary: We propose a new strategy to manipulate the wavefronts of surface waves (SWs) using Pancharatnam-Berry (PB) metasurfaces, which exhibit predesigned phase profiles. By scattering waves from different PB meta-atoms, a new SW wavefront can be formed under appropriate wavevector matching condition. Experimental results in the microwave regime demonstrate efficient SW manipulations, including deflection, focusing, Bessel beam, and Airy beam generations. These findings may inspire the realization of highly miniaturized on-chip devices for integrated photonics applications.
Article
Nanoscience & Nanotechnology
Zhening Fang, Haipeng Li, Yan Chen, Shulin Sun, Shiyi Xiao, Qiong He, Lei Zhou
Summary: This paper proposes a deterministic approach to design passive metasurfaces that can reflect impinging light to arbitrary nonspecular directions with almost 100% efficiencies. By matching boundary conditions and solving self-consistently with all allowed near-field modes based on given incident and out-going far-field waves, passive meta-atoms can be constructed and metadevices can be designed deterministically. Experimental results demonstrate the feasibility of this approach.
Article
Optics
Haoyang Zhou, Sheng Zhang, Shunjia Wang, Yao Yao, Qingnan Cai, Jing Lin, Xiaoying Zheng, Zhuo Wang, Zhensheng Tao, Qiong He, Lei Zhou
Summary: We experimentally demonstrate dynamic modulation on terahertz (THz) waves using a dielectric metasurface, by selectively pumping the system at different optical wavelengths. Our studies reveal that the pump light wavelength can serve as a new external knob to dynamically control THz waves and inspire new designs for tunable devices with diversified functionalities.
ADVANCED PHOTONICS
(2023)
Article
Optics
Yizhen Chen, Xiaoying Zheng, Feifei Liu, Weikang Pan, Zhuo Wang, Muhan Liu, Zhiyan Zhu, Yingying Wang, Liangwei Li, Qiong He, Lei Zhou, Shulin Sun
Summary: By constructing high-efficiency bifunctional metasurfaces, we have successfully generated two plasmonic vortices with distinct topological charges, which can find wide applications in on-chip photonics.
Article
Optics
Xiaoying Zheng, Jing Lin, Zhuo Wang, Haoyang Zhou, Qiong He, Lei Zhou
Summary: Researchers demonstrate that an optical metasurface formed by two vertically coupled resonator arrays can achieve perfect reflectionlessness at all frequencies below the first diffraction mode. The ratio between light transmission and absorption can be modulated by tuning the intrinsic loss of the system while keeping reflection minimized. By varying the near-field and far-field couplings between resonators, the system can transition between different phase regions in a generic phase diagram.
