Article
Chemistry, Multidisciplinary
Zhen Yue, Jingyu Liu, Jitao Li, Jie Li, Chenglong Zheng, Guocui Wang, Mingyang Chen, Hang Xu, Qi Wang, Xiaohua Xing, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: This study introduces a novel technology based on dynamic phase and spatial interleaving unit arrangement for metasurfaces, enabling multiple wavefront manipulations including spin and linear polarization transformations. By designing a bifocal metasurface, various forms of wavefront manipulations can be achieved, offering a new platform for the development of terahertz integrated photonics.
Article
Materials Science, Multidisciplinary
Linda Shao, Zhenfei Li, Zhengping Zhang, Xiong Wang, Weiren Zhu
Summary: Metasurfaces are widely studied for flexible manipulation of electromagnetic wavefront and polarization. This research presents a single-layer anisotropic metasurface for independent wavefront manipulation in multiple polarization channels, achieving mixed manipulations of wavefront and polarization.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Ashfaq Ahmad, Jawad Ali, Dong-You Choi
Summary: This paper presents the design and optimization of a dual-band polarization-dependent metasurface capable of dynamically switching transmission and reflection characteristics. By changing the incident wave polarization, the metasurface is able to transform the transmission band into a complete reflection band, and vice versa. Remarkable transmission and reflection characteristics are achieved within the frequency ranges of 6.1-6.55 GHz and 8.9-9.3 GHz.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Shilei Liu, Chunmei Ouyang, Zhibo Yao, Jing Zhao, Yanfeng Li, Longcheng Feng, Caihong Zhang, Biaobing Jin, Jiajun Ma, Hongyi Li, Yi Liu, Quan Xu, Jiaguang Han, Weili Zhang
Summary: This article presents a method to achieve terahertz multifunctional anisotropic reflective metasurfaces using coding metasurfaces, which can realize narrow-band absorption and broadband polarization conversion based on different coding matrices, and integrate with vanadium dioxide (VO2) for temperature-controlled active metasurfaces. This research has promising applications in terahertz modulation and functional devices.
Article
Chemistry, Multidisciplinary
Xiaoqiang Jiang, Wenhui Fan, Chong Qin, Xu Chen
Summary: A broadband polarization conversion metasurface is proposed for efficient wavefront manipulation in THz wireless communication systems, showing high transmission and polarization conversion rates. Applications like anomalous refraction, focusing metalens, and vortex beam generation demonstrate the vast potential of the metasurface.
Article
Optics
J. I. A. N. Z. H. O. U. Huang, Bin Hu, G. U. O. C. U. Wang, Z. O. N. G. Y. U. A. N. Wang, J. I. N. L. O. N. G. LI, J. U. A. N. Liu, Y. A. N. Zhang
Summary: This work demonstrates a reconfigurable THz phase modulator with 5x5 independently tunable units enabled by switching the voltages applied on 10 graphene ribbons. The efficiency of the device is enhanced by 2.7-3.6 times under different graphene chemical potentials through introducing quasi bound states in the continuum resonance using a designed double C-shaped antenna. Experimental results show the formation of a focus with a changed focal length from 14.3mm to 22.6mm. This work provides potential for compact THz spatial light modulators that may be applied in THz communication, detection, and imaging.
PHOTONICS RESEARCH
(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
Chemistry, Multidisciplinary
Zhen Yue, Jitao Li, Jie Li, Chenglong Zheng, Jingyu Liu, Die Zou, Hang Xu, Fan Yang, Hui Li, Liang Wu, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: A versatile all-dielectric metasurface platform capable of dual-functional polarization manipulation for the orthogonal states of polarization in the terahertz frequency range is proposed. The platform exhibits the properties of a full-waveplate and a quarter-waveplate for different circularly polarized light. Experimental demonstrations through the design, fabrication, and characterization of representative metasurfaces validate the capability of dual-functional polarization manipulation.
Article
Materials Science, Multidisciplinary
Wei Liu, Lei Zhang, Jun Chen Ke, Jing Cheng Liang, Jun Yan Dai, Qiang Cheng, Tie Jun Cui
Summary: This article introduces a transmissive metasurface that can manipulate both the polarization and phase of electromagnetic waves. It has the ability to rotate the polarization of linearly polarized waves to any desired azimuth direction and achieve cross-polarization conversion for circularly polarized waves.
ADVANCED OPTICAL MATERIALS
(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
Physics, Applied
Yan Wang, Shaohe Li, Hui Wang, Longcheng Feng, Bowen Tan, Yihui Tan, Runfeng Su, Jingbo Wu, Caihong Zhang, Biaobing Jin, Jian Chen, Peiheng Wu
Summary: This study demonstrates a broadband, ultrathin, and efficient metasurface-based asymmetric transmission and wavefront manipulation method in the terahertz region, which provides a promising route for applications such as information encryption, THz wireless communication, and spectroscopy.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Yuehong Xu, Quan Xu, Xueqian Zhang, Xi Feng, Yongchang Lu, Xixiang Zhang, Ming Kang, Jiaguang Han, Weili Zhang
Summary: This study proposes a new design scheme using all-metal stereo U-shaped meta-atoms for efficient and broadband manipulation of terahertz polarization. The design is experimentally verified to demonstrate superior performance in polarization control and enriches the design freedom of polarization-related metasurfaces.
ADVANCED FUNCTIONAL MATERIALS
(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
Optics
Tong Wu, Huifang Zhang, Sivaloganathan Kumaran, Yuehong Xu, Qingwei Wang, Wladislaw Michailow, Xueqian Zhang, Harvey E. Beere, David A. Ritchie, Jiaguang Han
Summary: In this study, we propose and experimentally demonstrate several spin-dependent wavefront control metasurfaces using all-silicon dielectric structures. These metasurfaces are easy to fabricate and have potential applications in terahertz optical systems and communication systems.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jianfeng Zhu, Yang Yang, Jiexin Lai, Jaim Nulman
Summary: This paper proposes ultrathin broadband polarization-insensitive transmissive metasurfaces that can manipulate the polarization and wavefront of electromagnetic waves arbitrarily. By rotating the transmitting antenna and adjusting the lengths of the transmission lines, the functions of polarization conversion and wavefront shaping are achieved, which are insensitive to polarization.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Environmental
Fu Chen, Shanshan Zhang, Beibei Ma, Yao Xiong, Hui Luo, Yongzhi Cheng, Xiangcheng Li, Xian Wang, Rongzhou Gong
Summary: In this study, bimetallic CoFe-MOF@Ti3C2Tx MXene derived multiple-interfacial composites with controllable structures were prepared and their microwave absorption properties were investigated. The results show that the synthesized composite exhibits excellent microwave absorption performance, providing a new approach for the design of high-performance microwave absorbing materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Optics
Jiaqi Liu, Yongzhi Cheng, Fu Chen, Hui Luo, Xiangcheng Li
Summary: A metasurface is designed to generate vortex beams at three distinct terahertz frequencies by utilizing unit-cell structures and geometric phase principle. The designed metasurface enables the generation of reflective vortex beams with high mode purity, offering potential applications in THz communication.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jun Li, Yongzhi Cheng, Junpeng Fan, Fu Chen, Hui Luo, Xiangcheng Li
Summary: In this work, a high-efficiency full-space metasurface is numerically demonstrated, which can manipulate the transmitted linear polarization and the reflected circular polarization wavefront independently. The proposed metasurface structure achieves cross-polarization conversion and phase control at different frequencies, and demonstrates anomalous refraction, reflection, and beam manipulation for both LP and CP waves.
Article
Engineering, Electrical & Electronic
Jinxiu Wang, Jingcheng Zhao, Yongzhi Cheng, Hui Luo, Fu Chen
Summary: This paper presents a dual-band high-gain microstrip antenna with a reflective metasurface. By using the reflective metasurface, the antenna can achieve different polarization radiation at two frequencies and enhance the radiation performance. The experimental results verify the feasibility of the proposed scheme and demonstrate its potential application in modern wireless communication systems.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Yongzhi Cheng, Yingjie Qian, Hui Luo, Fu Chen, Zhengze Cheng
Summary: In this paper, a narrowband perfect metasurface absorber (MSA) based on a micro-ring-shaped GaAs array was proposed and theoretically investigated in the terahertz (THz) region for enhanced refractive index (RI) sensing. Simulation results showed that the proposed perfect MSA achieved an absorbance of 99.9% at 2.213 THz with a Q-factor of approximately 460.08, which was efficiently confirmed by the coupling mode theory (CMT). The perfect absorption of the designed structure was primarily contributed by the guided mode of critical resonance coupling. The absorption properties of the proposed structure could be adjusted by changing the geometrical parameters of the GaAs structure. The proposed MSA, due to its higher Q-factor, can enhance RI sensing applications with a sensitivity of about 1.45 THz/RIU. This research provides a new approach for constructing highly efficient MSAs with potential applications in sensing, detecting, and imaging in the THz region.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Zimu Zhang, Yongzhi Cheng, Hui Luo, Fu Chen
Summary: This paper proposes a wideband circular polarization metasurface antenna, consisting of a centrosymmetric structure with a mode suppressor and an asymmetric aperture-coupled feed structure separated by dielectric substrates. Two orthogonal modes with a 90 degrees phase difference are excited by an L-shaped slot and a microstrip line in the aperture-coupled feed structure to achieve CP radiation. Two methods are proposed to expand the CP bandwidth: directly suppressing the characteristic mode and indirectly suppressing it using a mode suppressor. The fabricated antenna shows a low profile of ?(0) x ?(0) x 0.075 ?(0) at 5 GHz, with a 3 dB axial ratio bandwidth of 45.2% (4.1-6.5 GHz), an impedance bandwidth of 41.8% (4.1-6.31 GHz), and a peak gain of 7.94 dBic at 5.9 GHz.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Optics
Jingcheng Zhao, Nan Li, Yongzhi Cheng
Summary: In this paper, an all-dielectric InSb metasurface is proposed for thermal tunable reflective linear-polarization conversion in the terahertz regime. The unit-cell consists of a single anisotropic InSb micro-cuboid structure adhered to a continuous InSb film, with its electric property actively tunable by changing temperature. The InSb metasurface achieves a high cross-polarization reflection coefficient over 90% and an average polarization conversion ratio over 95% from 1.21 THz to 1.92 THz with a relative bandwidth of 45.4%. The designed metasurface can convert the LP wave into its orthogonal component after reflection over a wide range of frequencies at a given external temperature. The simple geometry and superior performance make it suitable for applications in sensors, reflector antennas, and radiometers in the THz regime.
OPTICS COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Nan Li, Jingcheng Zhao, Peiyi Tang, Yongzhi Cheng
Summary: In this paper, a novel and simple design of an all-metal 3D anisotropic metamaterial (3DAMM) is proposed and numerically investigated. The design achieves a high-efficient and wide-angle ultrabroadband reflective linear-linear and dual-band linear-circular polarization conversion in the terahertz (THz) region. The design consists of a periodic array of copper stand-up split ring resonator (SRR) adhered on a copper film ground plane. The proposed design demonstrates a high conversion efficiency of over 90% within a relative bandwidth of 88.7% and is applicable for a wide range of incident angles (0 degrees-50 degrees). The polarization conversion properties can be adjusted by changing the geometric parameters of the unit cell.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zhixiang Xu, Cheng Ni, Yongzhi Cheng, Linhui Dong, Ling Wu
Summary: In this paper, a photo-excited metasurface (MS) based on hybrid patterned photoconductive silicon (Si) structures is proposed to achieve tunable reflective circular polarization (CP) conversion and beam deflection at two frequencies independently in the terahertz (THz) region. The proposed MS consists of a metal circular-ring (CR), Si ellipse-shaped-patch (ESP), and circular-double-split-ring (CDSR) structure, a middle dielectric substrate, and a bottom metal ground plane. By modifying the conductivity of the Si ESP and CDSR components through external infrared-beam pumping power, the proposed MS can achieve high efficiency reflective CP conversion and 2π phase shift at two distinct frequencies. A supercell MS is also constructed for reflective CP beam deflection with dynamically tunable efficiency. The proposed MS shows promising applications in active functional THz wavefront devices.
Article
Multidisciplinary Sciences
Dongru Yang, Yongzhi Cheng, Hui Luo, Fu Chen, Ling Wu
Summary: This paper presents a simple design of an ultrathin and ultra-broadband single-layer metamaterial surface (MS) based on a double-arrow-shaped resonator (DASR) structure for both transmission and reflection modes in the terahertz (THz) region. The single-layer MS consists of a periodic array of metal DASRs and complementary circular patches (CCPs) on a thin dielectric substrate. Numerical results show that the MS structure can convert circularly polarized (CP) waves to their orthogonal components after reflection and transmission simultaneously, with an average amplitude of approximately 0.45 from 0.45 to 1.75 THz and a relative bandwidth of 118.2%. The CP conversion efficiency is close to the theoretical limit of 25% for single-layer structures. Additionally, by adjusting the orientation angle (alpha) of the DASR structure along the wave propagation direction, 0-2 pi phase shifts for the reflected and transmitted orthogonal CP waves can be achieved simultaneously. Numerical simulations demonstrate wave beam deflection, vortex beam generation, and focusing effects for both reflection and transmission modes. This design offers new possibilities and potential for developing multifunctional full-space devices.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yongzhi Cheng, Yingjie Qian, Haruki Homma, Ashif Aminulloh Fathnan, Hiroki Wakatsuchi
Summary: In this study, two types of waveform-selective microwave metasurface absorbers (MMAs) were numerically and experimentally demonstrated. By designing specific circuit and geometrical parameters, these absorbers can selectively absorb signals of specific waveforms at the same frequencies, including higher-order modes. These waveform-selective MMAs have a wide range of applications in electromagnetic shielding, detection, sensing, and wireless communications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Physical
Fu Chen, Yongzhi Cheng, Xiangcheng Li, Hui Luo
Summary: This study successfully prepared 2D Ti3CNTx-based magnetic composites by modifying Ti3CNTx nanomaterials and combining them with magnetic materials, achieving broadband microwave absorption. The microwave absorption properties of the composites were investigated by varying the volume ratio of the nanomaterials and the filling ratio of the absorber. With a thickness of 1.32 mm, the absorber achieved a bandwidth of 4.75 GHz. Integrated with a macroscale multilayer periodic gradient design, the metastructure based on FCM (Fe@NC/Ti3CNTx) composites achieved broadband microwave absorption with an EAB of 12.5 GHz ranging from 5.5 GHz to 18 GHz at a total thickness of 4.5 mm. The microwave attenuation mechanisms were studied through dielectric loss, magnetic loss, and impedance matching. The multi-scale development of MXene-based magnetic composites enables their potential application in broadband microwave absorption.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Nan Li, Jingcheng Zhao, Peiyi Tang, Yongzhi Cheng
Summary: In this paper, a broadband and high-efficient reflective linear-circular polarization convertor (LCPC) based on three-dimensional (3D) all-metal anisotropic metamaterial (AMM) in terahertz (THz) region is proposed. The LCPC unit-cell consists of a stand-up inverted U-shaped resonator (USR) deposited on a ground plane. The designed LCPC can convert both incident x-and y -polarized (y-pol) waves from linear to circular polarization after reflection in a broadband frequency range of 1.98-4.12THz with high efficiency.
OPTICS COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Linhui Dong, Yongzhi Cheng, Hui Luo, Fu Chen, Xiangcheng Li
Summary: This paper proposes an all-metal metasurface that enables circular polarization conversion and wavefront manipulation of terahertz waves. Numerical simulations demonstrate high transmission and reflection conversion coefficients over a wide frequency range, as well as the ability to achieve 2 pi-phase full coverage. The study also showcases the multifunctional wavefront manipulation capabilities of the proposed metasurface.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Physics, Applied
Hiroki Takeshita, Daisuke Nita, Yongzhi Cheng, Ashif Aminulloh Fathnan, Hiroki Wakatsuchi
Summary: In this study, a design method for waveform-selective metasurface absorbers operating in multiple frequency bands is presented and validated through numerical and experimental verification. The method allows the absorbers to preferentially absorb target electromagnetic waves of the same frequency based on the incident waveform, specifically the pulse width. By adjusting the spatial ratio of unit cells assigned to different frequencies, the performance of the dual-band approach is enhanced. This study opens up possibilities for the utilization of waveform-selective metasurfaces in diverse frequency bands, providing a valuable and versatile solution for various applications.
APPLIED PHYSICS LETTERS
(2023)