Article
Optics
Fan Yang, Chenglong Zheng, Jitao Li, Hui Li, Chunyu Song, Zhen Yue, Xin Ding, Yating Zhang, Jianquan Yao
Summary: It is proposed to achieve simultaneous control of the amplitude and phase of orthogonal linearly polarized lights in multichannels using an all-dielectric metasurface. Three pairs of complex amplitude information are encoded in three independent channels by selecting and combining the meta-atoms. The performance of the proposed metasurface in the terahertz (THz) band is verified through three designed examples, and the simulation results agree with experimental results. The single-layer structure design provides controllable focusing, compact structure, and simple fabrication, offering an alternative approach for integrated multifunctional and miniaturized optical devices.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xiaosai Wang, Jinlei Wu, Ruoxing Wang, Li Li, Yongyuan Jiang
Summary: This paper proposes a method for reconstructing polarization multiplexing terahertz holographic images based on transmissive metasurfaces. The metasurfaces, composed of all-dielectric meta-atoms, are designed as multi-foci metalenses, and the focal points are used as the pixels of the reconstructed images. The effects of focal length and phase pixel number on the focal points of the metalenses are analyzed to achieve high-resolution holographic images. Furthermore, holographic images with different patterns can be reconstructed on the focal plane by switching the polarization of incident lights. These high-resolution and polarization multiplexing metasurface holograms hold great promise for applications in THz communications, information engineering, and encryption.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Hao Wang, Baifu Zhang, Cheng Han, Jianping Ding
Summary: The proposed dynamic-phase-only polarization-multiplexing metasurface with polarization-decoupled metaatoms demonstrates the effectiveness in deflecting different polarized incident lights independently and covering a wide phase range. This study paves the way for the design of polarization-multiplexing electromagnetic structures for application in metamaterials and metasurfaces.
Article
Physics, Applied
Deer Su, Xinwei Wang, Guanyu Shang, Xumin Ding, Shah Nawaz Burokur, Jian Liu, Haoyu Li
Summary: This paper presents a hologram design method based on designed metasurfaces and the inverse angular spectrum diffraction theory. By using bi-layered split rings as meta-atoms, the transmission amplitude and phase of electromagnetic waves can be controlled independently. Experimental results show that this method exhibits better image quality compared to the traditional Gerchberg-Saxton algorithm.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Gyeongtae Kim, Yeseul Kim, Jooyeong Yun, Seong-Won Moon, Seokwoo Kim, Jaekyung Kim, Junkyeong Park, Trevon Badloe, Inki Kim, Junsuk Rho
Summary: This study proposes a metasurface-enhanced structured light depth-sensing platform that can scatter high-density dot arrays over a 180-degree field-of-view. It has potential applications in face recognition and automotive robot vision.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Song Gao, Jianchun Xu, Jinqing Cao, Huiming Yao, S. Eltahir Ali, Hala M. Abo-Dief, Abdullah K. Alanazi, Chuwen Lan, Hassan Algadi, Xiaojun Zhai
Summary: In this study, a high-efficiency magnetically tunable terahertz all-dielectric metasurface absorber scheme based on high modes is proposed. By compounding the all-diectric metasurface with liquid crystal, the device can be tuned by different applied magnetic fields. The results show that the absorption peak of the device is very sensitive to different applied magnetic fields. The design of the all-dielectric metasurface absorber is optimized, with a tuning figure of merit (FOM) of up to 6.67, demonstrating the advantages of simple fabrication, low cost, and high integration.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chenglong Zheng, Jie Li, Guocui Wang, Jitao Li, Silei Wang, Mengyao Li, Hongliang Zhao, Zhen Yue, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: Metamaterials achieve superior electromagnetic properties by adjusting structure, and chiral metamaterials are widely used in optics. A novel approach using all-silicon coding metasurfaces to achieve chirality-like function through spin decoupling is proposed, with experimental verifications conducted.
Article
Materials Science, Multidisciplinary
Zhengdiao Zheng, Chenxia Li, Xufeng Jing
Summary: By designing an all-dielectric silicon metasurface with an elliptical-cylindrical unit structure, this research demonstrates the generation of terahertz vector Bessel beams with different polarization characteristics. The spatial position polarization control of the beam is achieved by rotating the unit structure, and the extra phase brought by the polarization control is offset using transmission phase.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Optics
Weibao He, Mingyu Tong, Zhongjie Xu, Yuze Hu, Xiang'ai Cheng, Tian Jiang
Summary: This study demonstrates the construction of a terahertz metasurface supported by the EIT effect through inverse design for the first time, showing the potential applications of inverse design in terahertz device design.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Analytical
Weinan Shi, Fei Fan, Shanshan Li, Ziyang Zhang, Hongliang Liu, Xianghui Wang, Shengjiang Chang
Summary: In this study, we developed a THz sensor that combines an all-dielectric metasurface with functionalized gold nanoparticles for immunosensing of target biomolecules. The sensor showed quantitative detection of HA antigen concentration and improved sensitivity with the functionalized Au NPs. Furthermore, the sensing method demonstrated specificity by selectively detecting only the HA antigen.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Optics
Yunyun Yang, Fumei Chai, Xin Huang, Tianqi Zhao, Peng Zhang, Chenxia Li, Bo Fang, Zhi Hong, Mingzhou Yu, Xufeng Jing
Summary: In this paper, a C-type all-dielectric metasurface is proposed, which can achieve high quality factor according to the analysis of the electromagnetic field of the metasurface unit structure. The unit structure parameters are optimized to achieve high quality factor. This all-dielectric metasurface is applied to biomolecular sensing and has important applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Physics, Applied
Jiu-Sheng Li, Chen Zhou
Summary: An all dielectric metasurface design is proposed in this paper to efficiently manipulate terahertz waves, including abnormal refraction, beam splitting, and orbital angular momentum beam generation. Different transmission angles and beam effects are achieved by periodically arranging different coding units, with good agreement between the simulation and theoretical results.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Leyong Hu, Bo Wang, Yang Guo, Shuo Du, Jianing Chen, Junjie Li, Changzhi Gu, Li Wang
Summary: This study proposes an all-dielectric metasurface that enhances terahertz emission in a nonlinear optical film under the excitation of laser pulses. Experimental results show that the metasurface can enhance terahertz emission in lithium niobate films up to 17 times, covering a frequency range of 0.1-4.5 THz.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Yumin Gong, Fangrong Hu, Mingzhu Jiang, Longhui Zhang, Yingchang Zou, Guobao Jiang, Yongchen Liu
Summary: This study presents a THz binary encoder based on graphene metasurface, which achieves separate modulation of each passband by electrically adjusting the Fermi energy of graphene. The function of THz frequency range binary coding is realized, laying a new foundation for the development of multifunctional integrated THz devices.
Article
Chemistry, Multidisciplinary
Hsin Yu Kuo, Sunil Vyas, Cheng Hung Chu, Mu Ku Chen, Xu Shi, Hiroaki Misawa, Yu-Jung Lu, Yuan Luo, Din Ping Tsai
Summary: The article presents the design and fabrication of a cubic-phase dielectric metasurface to generate a vertically accelerated two-dimensional (2D) Airy beam. Experimental demonstration shows that this beam has unique propagation characteristics and can be used for three-dimensional manipulation of microscale particles.
Article
Materials Science, Multidisciplinary
Xi Feng, Xieyu Chen, Yongchang Lu, Qingwei Wang, Li Niu, Quan Xu, Xueqian Zhang, Jiaguang Han, Weili Zhang
Summary: This paper proposes and experimentally demonstrates a new method for directly emitting focused THz vortex beams with desired orbital angular momentums. The method utilizes patterned ITO film to generate nonlinear THz emission, achieving effective integration of THz emission and vortex-beam generation.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Xiaolin Zhuang, Wei Zhang, Kemeng Wang, Yangfan Gu, Youwen An, Xueqian Zhang, Jianqiang Gu, Dan Luo, Jiaguang Han, Weili Zhang
Summary: A C-shape-split-ring-based phase discontinuity metasurface with a liquid crystal elastomer substrate is introduced for infrared modulation of terahertz wavefront. By manipulating the deflection of the substrate, controllable and broadband wavefront steering is achieved, with a maximum output angle change of 22 degrees at 0.68 THz. The liquid crystal elastomer metasurface also demonstrates the performance of a beam steerer, frequency modulator, and tunable beam splitter, which are highly desired in terahertz wireless communication and imaging systems.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Fan Huang, Quan Xu, Wanying Liu, Tong Wu, Jianqiang Gu, Jiaguang Han, Weili Zhang
Summary: A method for generating superposed optical vortices in the terahertz frequency range with orthogonal circular polarization incidences is proposed and demonstrated. This method provides opportunities for developing ultracompact terahertz functional devices.
PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Qingwei Wang, Xueqian Zhang, Quan Xu, Xi Feng, Yongchang Lu, Li Niu, Xieyu Chen, Eric Plum, Jianqiang Gu, Quanlong Yang, Ming Fang, Zhixiang Huang, Shuang Zhang, Jiaguang Han, Weili Zhang
Summary: Coupling between different meta-atoms within the unit-cell can be used to control nonlinear THz generation, where achiral coupling provides control over THz field amplitude and chiral coupling makes THz generation sensitive to pump polarization. Multiplexed pump-handedness-selective nonlinear metasurfaces can be realized, allowing for the generation of THz beams with different orbital angular momentum. This approach enables the development of various integrated nonlinear THz devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yi Xu, Jianqiang Gu, Yufei Gao, Quanlong Yang, Wanying Liu, Zhibo Yao, Quan Xu, Jiaguang Han, Weili Zhang
Summary: This study presents a novel meta-atom scheme using a silicon-silica-silicon sandwich-shaped structure, which enlarges the propagation phase and improves the dispersion engineering capability at low losses. An achromatic metalens is constructed using these meta-atoms, which exhibits remarkable achromatic focusing performance in the THz domain. This research not only demonstrates an outstanding terahertz achromatic metalens but also provides innovative ideas for constructing achromatic metasurfaces in various applications, beyond the THz domain.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Jiajun Ma, Chunmei Ouyang, Yuting Yang, Hongyi Li, Li Niu, Xinyue Qian, Yi Liu, Bin Yang, Quan Xu, Yanfeng Li, Liyuan Liu, Zhen Tian, Jianqiang Gu, Jiaguang Han, Weili Zhang
Summary: Topological photonics has advanced from theoretical concept to practical applications, with valley topological photonic crystals being a key candidate for future functional devices. However, the design and arrangement limitations have hindered the exploration of multichannel valley topological beam splitters. In this study, we investigate and demonstrate the robustness of different domain walls in valley topological photonic crystals and present a highly integrated multichannel valley topological beam splitter. Compared to traditional beam splitters, it is more robust, compact, and offers higher integration and more output ports. This brings new opportunities for engineering the flow of light and designing miniaturized integrated photonic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Guanxuan Guo, Xueqian Zhang, Li Niu, Tong Wu, Xieyu Chen, Quan Xu, Jiaguang Han, Weili Zhang
Summary: We propose a programmable graphene metasurface based on the quantum effect analogue, electromagnetically induced transparency, which enables continuous amplitude and phase tuning of cross-polarized transmission in the terahertz (THz) regime. This programmable scheme allows flexible control over the diffraction angles and focal lengths of the transmitted THz beams, providing new inspirations for THz programmable metasurface devices.
Article
Chemistry, Physical
Jiaqi Zhang, Yuyue Yan, Hongwei Zhao, Xudong Niu, Liyuan Liu, Chunmei Ouyang, Weili Zhang
Summary: The GHz and THz complex dielectric spectra of a polyethylene glycol dimethyl ether (2000 g/mol) aqueous solution were investigated. The reorientation relaxation of water in this type of macro-amphiphilic molecule solution can be well described by three Debye models: under-coordinated water, bulk-like water, and slow hydrating water. The reorientation relaxation timescales of bulk-like water and slow hydration water both increase with concentration. By calculating the experimental Kirkwood factors of bulk-like and slow hydrating water, the changes in their dipole moments were estimated. The estimated water molecule numbers of three water components around monomers also support the sorting of water components.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Applied
Chunqiao Qiu, Chunhua Xue, Luxi Yuan, Feng Li, Quan Xu, Hongyu Zhu, Quan Li, Zhengren Zhang
Summary: Recently, there has been significant interest in a new type of metasurface called the induced-magnetism Huygens' metasurface, which has the ability to manipulate electromagnetic waves. However, the current research mainly focuses on passive functionality, which limits its adaptability for practical applications and commercialization. This study proposes an ultra-compact and dynamically tunable design strategy for the induced-magnetism Huygens' metasurface, which uses electric dipoles separated by a dielectric spacer with integrated varactors in each dipole. By adjusting the voltage of each unit, the transmission phase can be individually tuned while maintaining high transmission amplitude. A proof-of-concept demonstration of an active magnetism induced Huygens' meta-lens is also presented, showing excellent dynamic wavefront manipulation performance. This method has the potential to pave the way for planar, lightweight, and cost-effective dynamic wavefront manipulation devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Xiaohan Jiang, Quan Xu, Yuanhao Lang, Wanying Liu, Xieyu Chen, Yuehong Xu, Hang Ren, Xibin Wang, Su Xu, Xueqian Zhang, Chunmei Ouyang, Zhen Tian, Jianqiang Gu, Jiaguang Han, Weili Zhang
Summary: Geometric phase metasurfaces, a branch of meta-optics, have gained significant attention in recent years. The concept has been extended to near-field regime for the control of surface plasmons (SPs) by rotating dipole sources. However, there are still puzzles and shortcomings, such as the explanation for the reported geometric phases equal to the rotation angle and twice the rotation angle of the dipole sources for SP controls, and the limited control strategies for a single wavelength. In this study, a rigorous derivation of SP excitation by circularly polarized illumination is performed, clarifying the rotation dependence and coordinate correlation of geometric phase control of SPs. Furthermore, a holographic approach is proposed to implement multiplexed geometric phase control, demonstrating the ability to couple and steer incident circular polarizations of different wavelengths and spin directions to specific SP focusing beams. This work paves the way for integrated and multiplexed SP devices.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Min Zhang, Shoujun Zhang, Qingwei Wang, Yihan Xu, Liwen Jiang, Yuyue Yan, Jiao Li, Zhen Tian, Weili Zhang
Summary: An ultrathin, flexible terahertz metamaterial based on biogel has been developed to detect the transmission of terahertz waves through biomolecules in aqueous solutions. The metamaterial can detect glucose in water, human serum, and human sweat with high sensitivity and can be used for long-term management of diabetes as a wearable device.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
