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
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
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
Optics
Mingyu Ou, Lei Liu, Yan Liu, Lanling Lan, Shiwei Xie, Xiaotao Shi
Summary: The design of three-element achromatic quarter-wave plate was optimized using fixed initial points, outperforming random initial points. Particle swarm optimization was found to be the best intelligent algorithm for designing achromatic wave plate.
Article
Computer Science, Information Systems
Da Yi, Ming-Chun Tang, Mei Li, Xing-Chang Wei
Summary: This work proposes an approach to efficiently couple evanescent waves below the cutoff frequency using ultrathin planar capacitive metasurfaces, demonstrating potential applications in miniaturized and high-performance transmission components.
SCIENCE CHINA-INFORMATION SCIENCES
(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
Chemistry, Multidisciplinary
James Davis, Durdu Guney
Summary: Metamaterial-based quarter-wave plates (QWPs) offer great potential in optical applications due to their ultra-thin profiles and tailored spectral responses. In this study, an ultra-thin, high-efficiency, and broadband QWP based on a TiO2/Au grating structure is designed. The challenges posed by multiple reflections and near-field effects in integrating these devices are discussed, along with insights for improved design methodology and optimization of integrated metamaterial QWPs and other metadevices.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Ming Yang, Duohui Huang, Lin Li, Tixian Zeng, Zhiyong Zhang, Qiu Deng
Summary: In this study, a high-quality and large-size wave plate of CdSe single crystal was successfully prepared, with high transmittance and stable phase delay, which has wide applications in the mid-infrared field.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Mechanics
Junjie Gu, Shi Yan, Lan Zhang, Chenmin Su, Binglun Yin, Shaoxing Qu
Summary: In this work, a novel design of underwater sound-absorbing metasurface based on wave mode conversion and cavity-plate coupling resonance is presented. The optimized design achieves broadband and low-frequency absorption with a deep subwavelength thickness. Experimental verification and parametric sweeps validate the effectiveness of the design. This research has significant potential for engineering applications in underwater sound-absorbing technologies.
COMPOSITE STRUCTURES
(2023)
Article
Optics
Taolve Yang, Chengyou Lin
Summary: This paper proposes a design method for generating circularly polarized attosecond pulses in the water window region. By utilizing aperiodic Cr/Sc multilayer mirrors, broadband reflective quarter-wave plates are designed to achieve high circular polarization and circular reflection in the water window region.
OPTICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Rajib Ratan Ghosh, Anuj Dhawan
Summary: Integrated photonic devices and circuits capable of optical computation and data storage beyond von Neumann architecture were proposed. They utilize non-volatile hybrid electro-optic plasmonic switches and novel architectures of combinational and sequential logic circuits. These designs feature minimum extinction ratios greater than 20 dB, compact designs, low operating power, and high-speed operations, showcasing the potential for effective logic operations by combining photonics, plasmonics, and electronics on the same platform.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Mohamed K. Emara, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta
Summary: A novel metallo-dielectric Huygens' unit cell is proposed that can operate as either a quarter wave plate or a half-wave plate. This unit cell is suitable for millimeter-wave implementation in printed-circuit board fabrication due to the absence of small line widths and gaps. It has been demonstrated in near-field experiments and simulations for polarization conversion and rotation of linear and circular polarization antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Physical
Jinling Gao, Wei Zhan, Yuhan Xiao, Xingrui Zhu, Wei Gao, Hong Yin
Summary: In this study, the surface plasmonic coupling between gold nanoparticles and ultrathin boron nitride nanosheets was demonstrated, leading to a significant enhancement of the Raman signal. By varying the size of the nanoparticles, the Raman signal of the nanosheets was improved from 1.7 to 71. The mechanism behind this enhancement was explored through the electromagnetic field coupling strength and charge transfer at the interfaces.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Erika Kozma, Anita Eckstein Andicsova, Alena Opalkova Siskova, Gabriele Tullii, Francesco Galeotti
Summary: This paper describes a simple and green approach to fabricate composite membranes using self-assembled polydopamine thin films and two different biopolymers at the air/water interface. It is found that the polydopamine thin films have abundant phenolic hydroxyl groups which enable in situ decoration of gold nanoparticles on the membrane surface, providing plasmonic features. Additionally, surface patterning of polydopamine layers using self-assembled templating structures is demonstrated, offering new perspectives for biocompatible functional membranes with tunable optical and spectroscopic properties. Finally, it is demonstrated that the obtained functional surfaces are promising tools for fabricating SERS substrates.
APPLIED SURFACE SCIENCE
(2022)
