Article
Optics
Mahmoud A. A. Abouelatta, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: A highly efficient broadband ultrathin quarter-wave plate is proposed in this paper using a plasmonic metasurface for circular-to-linear and linear-to-circular polarization conversion. The design features three diagonally coupled L-shaped resonators that produce constructive responses with high power conversion efficiency. The anisotropy of the proposed unit cell leads to collective resonance, resulting in nearly zero power of the undesired polarization state over the whole operation bandwidth.
Article
Optics
Zhuo Zhang, Yandong Gong, Kai Pang
Summary: This work realizes a broadband terahertz achromatic quarter wave plate by stacking multiple metasurface layers, enabling arbitrary polarization control and ideal applicability in other frequency bands.
Article
Optics
Dongming Liu, Tingting Lv, Guohua Dong, Chao Liu, Qiang Liu, Zheng Zhu, Yuxiang Li, Chunying Guan, Jinhui Shi
Summary: This study introduces a single-layer terahertz anisotropic metasurface quarter-wave plate for broadband linear to pure circular polarization conversion, with robust performance across various incident angles. Angle-tunable arbitrary polarization states can be achieved by changing the angle of incidence at other frequencies, promoting the development of broadband polarization conversion components.
OPTICS COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jinhai Sun, Yong-Qiang Liu, Jining Li, Xutao Zhang, He Cai, Xianli Zhu, Hongcheng Yin
Summary: A terahertz flexible metamaterial quarter-wave plate (QWP) is designed and fabricated using polyimide as the substrate, which exhibits a 3 dB axial ratio bandwidth of 0.51 THz, high polarization conversion efficiency, and transmittance. The effects of incidence angle on the polarization conversion performance and the blocking effect of the QWP combined with a polarizer on the backward reflection of terahertz waves are studied. The flexible terahertz metamaterial QWPs and polarizers have the potential to effectively block harmful reflected waves in terahertz communication and other systems, and they offer advantages such as a simple structure, ultra-thinness and flexibility, easy integration, and no external magnetic field or low-temperature requirements.
Article
Optics
Xiaolong You, Rajour T. Ako, Wendy S. L. Lee, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux, Withawat Withayachumnankul
Summary: Polarization conversion is widely used in biology, chemistry, and communications. To enhance efficiency and bandwidth, a transmissive half-wave plate is designed based on the concept of Huygens' metasurface, achieving a wider frequency range and higher efficiency.
Article
Optics
Jianing Ouyang, Chenlei Xu, Yuan Yang, Lingling Wang, Kaipeng Gao, Yuanhang Chen, Qian He, Tong Li, Xiongjun Shang
Summary: A Babinet InSb metasurface composed of C-shape resonators is proposed in this study, which can tailor the anisotropic amplitudes and phases of reflected light along two orthogonal axes by adjusting external temperature in the THz range. The designed metasurface acts as a 90 degrees polarization rotator with a high polarization conversion ratio of up to 97% at 1.36 THz, showing promising potential for wave retarder devices and modern optical systems.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Optics
Shengnan Guan, Jierong Cheng, Yiwu Yuan, Xipu Dong, Fei Fan, Xianghui Wang, Shengjiang Chang
Summary: A dielectric grating structure is proposed as a wideband quarter-wave plate at terahertz frequencies, offering alleviated structure complexity and wide bandwidth. The superposition of waveguide modes is used to achieve wideband linear-to-circular polarization conversion.
OPTICAL ENGINEERING
(2022)
Article
Optics
Ahasan Ullah, Yi-Chieh Wang, Sanjida Yeasmin, Yijing Deng, Jun Ren, Yu Shi, Lei Liu, Li-Jing Cheng
Summary: This paper presents a novel photoinduced reconfigurable metasurface for high spatial resolution terahertz (THz) wave modulation. The metasurface overcomes the limitation of lateral diffusion and ensures conductivity, creating high-definition photoconductive patterns with excellent modulation depth and tunable central frequency. It bears important implications for the implementation of reconfigurable THz devices.
Article
Computer Science, Information Systems
Joysmita Chatterjee, Akhilesh Mohan, Vivek Dixit
Summary: This paper presents a metasurface-based polarization converter for ultrawideband radar cross-section reduction. The converter is designed to have enhanced polarization conversion bandwidth and stable conversion efficiency. The polarization conversion metasurface array is applied on planar and cylindrical conformal surfaces to reduce the radar cross section. The results show significant reduction in radar cross section within the ultrawideband range.
Article
Materials Science, Multidisciplinary
Chen Chen, Shenglun Gao, Xingjian Xiao, Xin Ye, Shengjie Wu, Wange Song, Hanmeng Li, Shining Zhu, Tao Li
Summary: The article presents a new metasurface design that combines local phase tuning and propagation phase to achieve efficient conversion of spin light to linearly polarized light, while also enabling wavefront engineering and the functionality of a quarter-wave plate.
ADVANCED PHOTONICS RESEARCH
(2021)
Article
Optics
Yufeng Tao, Bingjie Wang, Weijie Xu, Xuejiao Wang, Yunpeng Ren, Zhiduo Xin, Kun He, Xiangjun Ma, Guangjian He, Chunsan Deng, Zijie Dai
Summary: The ion-interactive semi-conductive hydrogel is a promising optoelectronic material with desirable electrical conductivity, optical clarity, and switchable dielectric properties. However, the development of actively modulated terahertz (THz) devices using hydrogel is still in its early stages. In this study, a scalable high-throughput picosecond laser system is used to rapidly tailor hydrogel into ion-interactive dielectric metasurfaces (IDMs). These IDMs possess negative permittivity, tunable time/frequency modulation, and high-consistency geometries for specific THz wave manipulations.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Li Jiu-sheng, Chen Yi
Summary: Coding metasurfaces, composed of coding particles, can manipulate electromagnetic waves. However, their design process is time-consuming and challenging. This study presents a novel terahertz metasurface structure consisting of parallel coding supercells, which can generate vortex beams with topological charge of l = 1 and symmetrical four beam splitting.
OPTICS COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Qinyu Qian, Pengfei Liu, Li Fan, Liang Zhao, Chinhua Wang
Summary: A non-sharp-corner quarter wave plate (NCQW) structured by an Ag hollow elliptical ring array is reported, with strong localized surface plasmons (LSP) resonances excited in the single layer of 8 nm thickness. By manipulating the parameters of the hollow elliptical ring, the transmitted amplitude and phase of the two orthogonal components are effectively controlled. This NCQW achieves a phase difference of pi/2 and an amplitude ratio of 1 simultaneously at the wavelength of 834 nm with a transmission of 0.46, and works well in an ultrawide wavelength band of 110 nm, showing great potential for advanced nanophotonic devices and integrated photonic systems.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Yadong Deng, Cuo Wu, Chao Meng, Sergey Bozhevolnyi, Fei Ding
Summary: This study presents a versatile GSP metasurface platform based on nanoscale quarter-wave plates that enable efficient control over the polarization state of light and reflected fields. By utilizing resonance and geometric phases, independent and simultaneous phase modulation of circularly polarized waves is achieved, allowing for arbitrary beam steering. The established platform offers flexible solutions for diverse metasurface-based polarization optics in modern integrated photonic devices.
Article
Engineering, Electrical & Electronic
Zamir Wani, Mahesh P. Abegaonkar, Shiban K. Koul
Summary: This article introduces a thin metasurface planar lens for millimeter-wave MIMO applications. The lens is composed of an array of mm-wave resonators that can modify the phase profile of the electromagnetic wave propagating through it. Experimental results show that the three-port antenna with the lens achieves beam scanning and high gain.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Optics
Yue Li, Xinlin Geng, Xianghong Kong, Xingsi Liu, Zhen Liu, Zheng Wang, Difei Liang, Qian Xie, Jianliang Xie, Longjiang Deng, Cheng-Wei Qiu, Bo Peng
Summary: This article reports a dynamic beam steering system with periodic grating nanostructures fabricated through nanoimprint lithography, achieving high-frequency, wide field of view control of light beams for efficient 3D space data acquisition, suitable for next-generation intelligent vision and self-driving technologies.
LASER & PHOTONICS REVIEWS
(2023)
Editorial Material
Optics
Lei Jin, Cheng-Wei Qiu
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zheng Zhang, Wei Xiang Jiang, Xin Ge Zhang, Wen Kang Cao, Lin Bai, Cheng-Wei Qiu, Tie Jun Cui
Summary: In this study, an acoustic full-space digital metasurface consisting of arrays of dual-channel elements with variable coding states is proposed and experimentally demonstrated. The reflected and transmitted sound waves can be independently and dynamically controlled. The presented element achieves high efficiency (up to 80% in transmission mode and nearly 100% in reflection mode) and enables decoupled modulations of the reflection and transmission coefficients. Tunable beam deflection and alterable wave focusing are experimentally validated without inter-modal crosstalk on both sides of the platform.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Yang Chen, Jiangang Feng, Yuqing Huang, Weijin Chen, Rui Su, Sanjib Ghosh, Yi Hou, Qihua Xiong, Cheng-Wei Qiu
Summary: This study demonstrates the realization of compact spin-valley-locked perovskite emitting metasurfaces with pure circular polarization, high directionality, and large emission angles by imparting spin-dependent geometric phases through Brillouin zone folding.
Article
Nanoscience & Nanotechnology
Hongtao Wang, Hao Wang, Qifeng Ruan, John You En Chan, Wang Zhang, Hailong Liu, Soroosh Daqiqeh Rezaei, Jonathan Trisno, Cheng-Wei Qiu, Min Gu, Joel K. W. Yang
Summary: By miniaturizing spiral phase plates and integrating them with structural colour filters, we have successfully generated coloured orbital angular momentum beams using incoherent white light. These beams, which possess both spatial and temporal coherence, can independently generate multiple helical eigenstates and combine colour information into orbital angular momentum beams.
NATURE NANOTECHNOLOGY
(2023)
Article
Optics
Tao Zhao, Peiyao Xie, Hujie Wan, Tianpeng Ding, Mengqi Liu, Jinlin Xie, Enen Li, Xuequan Chen, Tianwu Wang, Qing Zhang, Yanyu Wei, Yubin Gong, Qiye Wen, Min Hu, Cheng-Wei Qiu, Xu Xiao
Summary: This study demonstrates the potential of MXene materials to achieve the intrinsic thin-film absorption limit across the entire 0.5-10 THz band, which is crucial for high-performance terahertz detectors in various fields such as wireless communications, astronomy, security screening, and medical imaging.
Article
Optics
Haoye Qin, Zengping Su, Mengqi Liu, Yixuan Zeng, Man-Chung Tang, Mengyao Li, Yuzhi Shi, Wei Huang, Cheng-Wei Qiu, Qinghua Song
Summary: Breaking the symmetry of photonic crystal slabs (PhCSs) can realize upward and downward asymmetry and arbitrarily polarized bound states in the continuum (BIC) by using a bilayer-twisted PhCS. This structure exhibits elliptical polarization states with constant ellipticity angle within the vicinity of BIC. The topological nature of BIC is reflected in the orientation angle of polarization state, with a topological charge of 1 for any value of ellipticity angle. Full coverage of Poincare sphere and higher-order Poincare sphere can be achieved by tailoring the twist angles. These findings may have applications in structured light, quantum optics, and twistronics for photons.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
He-Xiu Xu, Guangwei Hu, Xianghong Kong, Yanzhang Shao, Patrice Genevet, Cheng-Wei Qiu
Summary: Electromagnetic wave multiplexing, especially for spatial-frequency multiplexing, is important for ultrathin multifunctional interfaces and high-capacity information processing and communication. However, it is challenging to achieve with passive and compact wave elements due to the exclusive coupling between wave excitation and scattering channels. In this study, a spin-momentum multiplexed paradigm called a super-reflector is proposed, enabling control of both retroreflections and anomalous reflections. By multiplexing four channels connecting two spin states and three spatial frequencies, a total of twelve channels are engineered, with five degrees of freedom in circular polarization Jones' matrix. Experimental verification has been conducted, showcasing twelve reflected beams with high efficiency exceeding 90.6%. This strategy opens up possibilities for angle multiplexing and angle-resolved metadevices.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Editorial Material
Optics
Jiazheng Qin, Mengjia Wang, Cheng-Wei Qiu
Summary: By controlling graphene, it has become easier to access and track exceptional points.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Zifu Xu, Ying Li, Gang Gao, Fei Xie, Ran Ju, Shimin Yu, Kaipeng Liu, Jiaxin Li, Wuyi Wang, Wei Li, Tianlong Li, Cheng-Wei Qiu
Summary: In this study, a scalable selective absorber with a quasiperiodic nanostructure composed of densely arranged Fe3O4 nanoparticles was reported for high-performance energy conversion of low-grade solar energy. By investigating the scale effect of the quasiperiodic densely arranged plasmonic nanostructure, a significant solar absorption rate of over 94% and ideal passive suppression of thermal emissivity below 0.2 were achieved simultaneously. A flexible planar solar thermoelectric harvester was demonstrated, reaching a significant sustaining open-circuit voltage of over 20 mV/cm(2) under natural sunlight (AM1.5G), without a heat sink. This highly versatile strategy is expected to lead the exploration of energy evolution in fundamental research and pioneer next-generation, high-performance, economical, and practical solar co-harvesting systems.
Article
Plant Sciences
Yi Wu, Fangbin Cao, Lupeng Xie, Feibo Wu, Shenlong Zhu, Chengwei Qiu
Summary: Aluminum toxicity is a major constraint to crop production in acidic soils. This study investigated the changes in miRNA expression in the roots of two olive genotypes with contrasting aluminum tolerance. A total of 352 miRNAs were discovered, and 11 miRNAs showed significantly different expression patterns between the tolerant and sensitive genotypes under aluminum stress. In silico prediction identified potential target genes involved in transcriptional regulation, hormone signaling, transportation, and metabolism. These findings provide new insights into the regulatory roles of miRNAs in enhancing aluminum tolerance in olives.
Article
Chemistry, Physical
Jinni Shen, Xu Liu, Yuhua Zhong, Chengwei Qiu, Huihui Xu, Hongsheng He, Haifeng Li, Jianhan Lin, Zizhong Zhang, Xuxu Wang
Summary: Solar light-driven overall water splitting for hydrogen production is an ideal solution to climate warming and energy shortage issues. Obtaining a highly efficient and stable photocatalyst remains a major challenge at present. Herein, NixP/gamma-Ga2O3 nanosheets are found to be a highly active and durable photocatalyst for pure water splitting into H2 and O2 without a sacrificial reagent.
ACS APPLIED ENERGY MATERIALS
(2023)
Editorial Material
Multidisciplinary Sciences
Yucheng Jiang, Yangliu Wu, Jinlei Zhang, Jingxuan Wei, Bo Peng, Cheng-Wei Qiu
Article
Materials Science, Multidisciplinary
Mengqi Liu, Weijin Chen, Guangwei Hu, Shanhui Fan, Demetrios N. Christodoulides, Changying Zhao, Cheng-Wei Qiu
Summary: Perfect absorbers that can completely absorb all incoming energy have been extensively studied and found to be associated with topological spectral phase singularities (SPS). The order of the topological invariant depends on the number of degenerate outgoing channels. By examining mirror-backed and all-dielectric structures, the generation, evolution, and annihilation of SPSs with different orders are revealed. A strategy based on charge conservation of SPSs has been established to design dual-band perfect absorbers. These findings highlight the topological origin of perfect absorption and its potential applications in biosensing, topological metasurfaces, and micro/nano thermal radiation.
Article
Engineering, Environmental
Cheng-Wei Qiu, Yue Ma, Zi-Feng Gao, Jakkrit Sreesaeng, Shuo Zhang, Wenxing Liu, Imrul Mosaddek Ahmed, Shengguan Cai, Yizhou Wang, Guoping Zhang, Feibo Wu
Summary: This study provides a comprehensive examination of genetic variation in aluminum-tolerant Tibetan wild barley through genome-wide profiling. The identification of key genes related to aluminum tolerance in barley and the strategy of manipulating these genes offer potential for developing more aluminum-tolerant barley cultivars.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
