Related references
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Article
Optics
Shiri Liang et al.
Summary: This study achieves wideband absorption in the long wavelength infrared range using a metamaterial absorber based on nanowire cross surrounding. The absorber has polarization independence and high absorptivity in the LWIR band, which can be adjusted by changing the geometric parameters. It is suitable for infrared imaging, thermoelectronic devices, and thermal detection applications.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wanlai Zhu et al.
Summary: To improve optical fiber sensing performance and broaden its application, a photonic crystal fiber (PCF) plasmonic sensor with a U-shaped channel based on surface plasmon resonance (SPR) is proposed in this study. The influence rules of structural parameters, such as the radius of the air hole, the thickness of the gold film, and the number of U-shaped channels, were investigated using COMSOL and the finite element method. The dispersion curves, loss spectrum, and electric field intensity distribution were studied under various conditions. The proposed sensor achieved a maximum refractive index sensitivity of 24.1 mu m RIU-1 in the RI range of 1.38-1.43, with a FWHM of 10.0 nm, a FOM of 2410 RIU-1, and a resolution of 4.15 x 10(-6) RIU. The sensor combines the highly sensitive SPR effect and allows for real-time detection of the external environment. The detection range and sensitivity can be increased by adjusting the structural parameters. The sensor has a simple structure and excellent performance, providing a new approach for real-time detection and highly integrated sensing.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Junyang Sui et al.
Summary: A layered metastructure consisting of graphene and isotropic dielectric mediums is studied theoretically, which can achieve the functions of tunable logic gate and refractive index sensing based on spin Hall effect. The asymmetric arrangement of the mediums and the increased angle of the incident electromagnetic waves give the metastructure Janus feature. By adjusting the chemical potential of graphene, a sharp absorption peak in the terahertz range can be obtained, corresponding to the forward and backward scales of NOT logic and OR logic, respectively. By locating the incident angle of light corresponding to the SHE displacement peak, a linear measurement relationship between refractive index and SHE angle can be realized with a wide measurement range of 1-1.4 and optimum sensitivity up to 153.5 degrees RIU-1. The refractive index sensing still strictly follows the logic functions of forward NOT and backward OR by adjusting the chemical potential of graphene and discerning the peak value of SHE displacement.
ANNALEN DER PHYSIK
(2023)
Article
Physics, Multidisciplinary
Wenxin Li et al.
Summary: In this paper, an active tunable terahertz bandwidth absorber based on single-layer graphene is proposed. It shows high absorption and excellent physical regulation in the range of 3.7 THz-8 THz when the Fermi energy (E-f) of graphene is 1.5 eV. The absorber exhibits superior tunability by adjusting physical parameters and E-f, and it is also polarization independent and insensitive to the incident angle.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Cheng Ma et al.
Summary: Based on the Green-function method and Landauer-Buttiker formalism, this study investigates the spin-dependent electron transport properties of zigzag graphene nanoribbons (ZGNRs) with triangular nanoconstrictions in the presence of ferromagnetic strips and spatial modulation of Rashba spin-orbit coupling (RSOC). The controllability of spin-flip and spin-conserved conductance peaks is demonstrated by adjusting RSOC strength and exchange magnetic field. The local density of states (LDOS) distribution around triangular nanoconstrictions is predicted. The spin filtering effect of ZGNRs with triangular and rectangular nanoconstrictions is compared.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jing Ma et al.
Summary: In this paper, a multi-band and multi-adjustable narrowband perfect absorber in the far infrared band is proposed. The absorber is a traditional MPA structure, consisting of a graphene array with embedded four-angle star patterns in the top layer, a SiO2 dielectric layer in the middle layer, and a gold substrate in the bottom layer. The absorber exhibits five absorption peaks with high absorption rates, and its frequency can be dynamically adjusted by changing the parameters of the graphene dielectric layer. Compared to previous absorbers, it has better tunability, higher sensitivity, and more absorption peaks. The research is expected to be valuable in fields such as high sensitivity sensors, photothermal detection, and thermal radiation.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Optics
Z. H. E. N. G. Q. Liu et al.
Summary: A multipolar silicon-based resonant meta-surface scheme is proposed, which achieves an ultra-sharp resonant spectrum by intercalating oblique slits into the silicon patches and hybridizing the excitation of electric and magnetic quadrupoles. An electro-optical modulator with a spectrally shifted modulation sensitivity up to 1.546 nm/V is demonstrated, as well as an optical sensor for ion solution concentration with a detection limitation of 5.15x10(-3). These findings provide an impressive strategy for resonant silicon-based nano-photonics and opto-electronic devices.
Article
Chemistry, Analytical
Fuyan Wu et al.
Summary: In this study, a solar absorber was created by superimposing three periodic Ti-Al2O3-Ti discs on a W-Ti-Al2O3 composite film structure. The physical process of achieving broadband absorption was investigated using the finite difference in time domain (FDTD) method. The results demonstrated that the absorber achieved an average absorption efficiency ranging from 95.8% to 96% over a wavelength range of 200 to 3100 nm.
Article
Chemistry, Analytical
Runing Lai et al.
Summary: This paper introduces a novel metamaterial absorber based on surface plasmon resonance (SPR) that has triple-mode perfect absorption, polarization independence, incident angle insensitivity, tunability, high sensitivity, and a high figure of merit (FOM). The structure of the absorber consists of a graphene array, SiO2 layer, and a gold mirror. The absorber achieves perfect absorption at frequencies of 4.04 THz, 6.76 THz, and 9.40 THz, with absorption peaks of 99.404%, 99.353%, and 99.146%, respectively. It also demonstrates maximum sensitivities in refractive index sensing and has potential applications in photodetectors, optoelectronic devices, and chemical sensors.
Article
Materials Science, Multidisciplinary
Zhibin Ye et al.
Summary: In this research, a simple tunable absorber based on graphene with tunable Fermi level was designed to solve the unadjustability of traditional noble metal absorbers in meeting complex application requirements in the actual electromagnetic environment. The performance of the absorber was theoretically simulated using the finite difference time domain (FDTD) method. The proposed absorber exhibited two perfect absorption peaks with high efficiency in its working band (90-155 μm). The absorber's absorption frequency can be adjusted through controlling the relaxation time and Fermi level of graphene or changing the refractive index of the medium. The proposed absorber has the potential to adapt to different electromagnetic environments and can be flexibly regulated in practical applications, opening up new possibilities for various fields such as detection and communication.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yuanjian Zhang et al.
Summary: In this paper, we propose and optimize an ultra-wideband solar absorber based on Ti-Al2O3 cross elliptical disk arrays, which has the characteristics of ultra-wideband absorption of solar energy and insensitivity to polarization and incident angles. The absorption spectrum and field distribution are analyzed, and the results demonstrate that the absorption bandwidth with the absorption rate beyond 90% reaches 1380 nm (385-1765 nm), and the average absorption reaches an astonishing 98.78%. The proposed ultra-wideband solar absorber is insensitive to the polarization angle and oblique incidence angle, and has research and application value in solar energy harvesting, photothermal conversion, and utilization.
Article
Engineering, Environmental
Xiangsi Wu et al.
Summary: This study presents a method to prepare mixed-valence cobalt oxide with regulatable ratio by introducing air at a certain temperature. The resulting nanosphere-shaped material shows multiple heterointerfaces and rich oxygen vacancies, exhibiting exceptional oxygen reduction reaction and oxygen evolution reaction activity. This material also performs well in zinc-air batteries and magnesium-air batteries, with excellent electrochemical performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xiuting Wu et al.
Summary: This study demonstrates a novel cathode material, ZnVO-800, derived from zeolitic imidazolate framework-8 (ZIF-8) by a self-sacrificed route. The ZnVO-800 cathode exhibits outstanding electrochemical performance, with high reversible capacity and excellent cycleability in aqueous zinc ion batteries. The electrochemical mechanism involves the transformation of ZnVO-800 into ZnxV2O5·nH(2)O with high electrochemical activity through in-situ electrochemical activation process, and the heterojunction with hierarchical structure enhances the dynamics and long-term cycleability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Ying Zheng et al.
Summary: In this study, a solar absorber and thermal emitter with ultra-broadband perfect absorption and high thermal radiation efficiency were designed. The absorber achieved a high absorption efficiency of 91.5% in the entire wavelength range and an average absorption efficiency of 99% in the selected range. The structure also exhibited excellent performance as a thermal emitter, with an optimal working temperature of 2000 K and a thermal radiation efficiency of 94.8%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhipeng Zheng et al.
Summary: A thermally tunable terahertz window has been proposed, which combines a metamaterial and the phase change material VO2. By controlling temperature, the window can regulate the absorption and transmission of terahertz waves. The window exhibits excellent performance in terms of absorbance and transmittance. It is also insensitive to polarised waves and maintains flexibility over a wide angular range.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Mingming Chen et al.
Summary: A tunable and three-dimensional dual-band metamaterial absorber based on electromagnetically induced transparency (EIT) is proposed. It consists of a cut wire (CW), two split ring resonators (SRRs), a metal plate, and a patterned vanadium dioxide (VO2) film. The conductivity of VO2 can dynamically control the absorptions at 1.05 THz and 1.16 THz, with maximum absorptions of 97.5% and 96.5% respectively. The metamaterial absorber exhibits wide polarization angle tolerance and robustness against oblique incidence, making it suitable for various applications such as terahertz sensors, modulators, and filters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Wenxin Li et al.
Summary: In this research, a tunable broadband absorber based on a layered resonant structure was designed, which achieved high absorption (more than 0.9) in the frequency range of 18-28 THz. The high absorption was attributed to strong resonance absorption between the layers and the resonance of the localised surface plasmon. The absorber, consisting of three layers of Dirac semimetal and three layers of optical crystal plates on a gold substrate, also showed tunability and absorption stability.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Haonan Qi et al.
Summary: In this paper, a switchable and tunable functional metamaterial device based on hybrid graphene-vanadium dioxide (VO2) is proposed. By utilizing the metal-insulator transition properties of VO2, the proposed metamaterials can switch between tunable circular dichroism (CD) and dual-band perfect absorption in the terahertz region. The operation mechanism behind the phenomena can be explained by utilizing the electric field distribution and the coupled mode theory. The proposed switchable and tunable metamaterial provides a platform for designing versatile functional devices in the terahertz region.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Xiangsi Wu et al.
Summary: In this study, Co, N-dual doped carbon catalyst (Co/NNC) was successfully prepared using a combination approach of SiO2 template and extra nitrogen source. The catalyst exhibited excellent electrocatalytic performance in the oxygen reduction reaction and was employed in zinc-air and magnesium-air batteries, showing outstanding performance.
JOURNAL OF POWER SOURCES
(2022)
Review
Chemistry, Multidisciplinary
Xu Zhou et al.
Summary: This review summarizes recent studies and achievements in the field of graphene-traditional fibers and graphene photonic crystal fibers (Gr-PCFs), highlighting the development process, preparation methods, and device applications. The integration of graphene with a PCF has led to the creation of a new hybrid fiber, Gr-PCF, which exhibits strong and tunable light-matter interaction capabilities across a wide spectrum range. Challenges and perspectives in advanced Gr-PCF research are also presented.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Bin Tang et al.
Summary: This paper demonstrates a polarization-controlled and symmetry-dependent multiple plasmon-induced transparency in a graphene-based metasurface. The phenomena can be actively modulated by adjusting the polarization and displacement of the nanostructures, and the mechanism behind it is attributed to the near-field coupling and electromagnetic interaction. The designed metasurface shows potential applications in mid-infrared optoelectronic devices.
Article
Chemistry, Physical
Fang Tang et al.
Summary: In this study, a MnS/MnO@N-CF composite was synthesized to improve the electrical conductivity and reaction kinetics of manganese-based materials for aqueous zinc ion batteries. The composite exhibited a high specific discharge capacity and superior cycleability, making it a promising cathode material for such batteries.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Zi Wang et al.
Summary: A semiconductor oxide composite consisting of ZnO nanorods and ZnO inverse opal was fabricated and used in the photoanode of QDSSCs. The study found that the pore size of the ZnO inverse opal in the composite greatly affects the performance of the QDSSCs.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Xingyu Wang et al.
Summary: This paper proposes a tunable sensing detector based on Bulk Dirac semimetals, which can realize frequency regulation and multi-frequency controllable sensing by adjusting the Fermi level of the semimetals. The detector exhibits high absorption rate, angular insensitivity, and high sensitivity, making it important for applications such as space detection and high-sensitivity biosensing detection.
Article
Chemistry, Physical
Dongying Wang et al.
Summary: In this paper, a dual-parameter sensor based on SPR-PCF is proposed for detecting magnetic field and temperature. The sensor has a unique structure and excellent sensing performance, which is important for simultaneous sensing of multiple basic physical parameters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Optics
Youming Guo et al.
Summary: In this paper, the recent advances on adaptive optics based on machine learning are summarized and the state-of-the-art performance of intelligent adaptive optics is reviewed. The potential advantages and deficiencies of intelligent adaptive optics are also discussed.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Chemistry, Physical
Yuting Li et al.
Summary: This research developed a stable CaF2 protective layer to address the issues of dendritic growth and side reactions in zinc ion batteries. The CaF2 layer exhibited excellent performance, resulting in an ultra-long cycle life and high capacity retention in Zn ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Bin Tang et al.
Summary: This paper proposes an actively tunable and switchable multi-functional terahertz metamaterial device based on a hybrid vanadium dioxide (VO2)-graphene integrated configuration. The functions of the device can be reversibly switched between asymmetric transmission and two different polarization conversions by transiting the phase of VO2. The performance of the device can be actively controlled by adjusting the geometrical parameters and Fermi energy of graphene.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Bin Tang et al.
Summary: This paper demonstrates a polarization-controlled dynamically tunable EIT-like effect based on graphene metasurfaces. By adjusting the graphene structure, transparent windows can be switched and adjusted in different polarization directions, providing a new solution for applications such as slow light, optical sensors, and filters.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Energy & Fuels
Ling Zhu et al.
Summary: The study focuses on enhancing the performance of lithium-sulfur batteries using acetylene black/sulfur composites and in-situ polymerization of polypyrrole, leading to excellent cycle stability and rate adaptability through advantages such as providing abundant micropores, a 3D conductive matrix, and promoting ion migration.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Zhongpeng Jia et al.
Summary: This study focuses on the tunable electromagnetically induced transparency-like (EIT-like) effect based on graphene metasurfaces, where transparency window can be modulated by changing the nanostructure geometry or adjusting the Fermi level of graphene. This provides an actively tunable group time delay of light and a sensitive refractive index sensor for various applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Yi Ren et al.
Summary: This study proposes a switchable bi-functional metamaterial device based on a hybrid gold-vanadium dioxide (VO2) nanostructure, which can achieve perfect absorption and asymmetric transmission (AT) in the near-infrared region through thermal switching. The device behaves as a chiral-selective plasmonic perfect absorber in the metallic state and exhibits a dual-band AT effect in the insulating state.
Article
Nanoscience & Nanotechnology
Yiqi Zhu et al.
Summary: The study introduces a monolayer BP-dielectric-metallic hybrid architecture with nearly perfect absorption efficiency at mid-infrared wavelengths; the system exhibits wide incident angle range and polarization sensitivity; tunable characteristics can be achieved by adjusting the doping level and geometric parameters of BP.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Optics
Yujun Wang et al.
Summary: The transmission characteristics of a side-polished eccentric photonic crystal fiber (PCF) were studied using the full-vector finite element method (FV-FEM). The proposed structure integrates refractive index (RI) sensing and polarization filtering, providing a highly sensitive and high-resolution optical sensor in different wavelength bands.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Xin Yan et al.
Summary: This paper presents a refractive index sensor model based on Photonic Crystal Fiber (PCF) and utilizes the surface plasmon resonance effect for measurement, showing high sensitivity and good linearity, making it suitable for liquid sensing.
Article
Chemistry, Multidisciplinary
Jiewei Chen et al.
Summary: A study demonstrates the use of Dirac semimetal PtSe2 in field-effect chirality devices, confirming the chiral anomaly effect and showing effective control of its transport properties with external fields, resulting in robust nonlocal valley transport with micrometer diffusion length and demonstrating basic logic functions.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
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Yi Ren et al.
Summary: This paper presents a multi-functional terahertz metamaterial device based on gold and vanadium dioxide, showcasing switchable performance between perfect absorption and broadband asymmetric transmission. The device demonstrates high efficiency in absorption and transmission, as well as perfect polarization conversion.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Riyanka Das et al.
Summary: CN-1 is a multi-functional azophenine based colorimetric chemosensor capable of detecting and distinguishing Cu2+ and Hg2+ through colorimetric and electrochemical readouts, with responsiveness to contaminated water samples and metal ion sequestration capability. Furthermore, it has the ability to monitor Cu2+ levels in biological fluids and store molecular level information.
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