Plasmonic photocatalysis demonstrates great potential for efficiently harnessing light energy. However, the underlying mechanisms remain enigmatic due to transient nature of reaction processes. Typically, plasmonic relies on excitation surface plasmon resonance (SPR) in materials, such as metal nanoparticles, leading generation high-energy or "hot electrons", albeit accompanied by photothermal heating Joule effect. The ability hot electrons participate chemical reactions is one key...

Hyperbolic polaritons in extremely anisotropic materials have attracted intensive attention due to their exotic optical features. Recent advances reveal unprecedented dispersion engineering of polaritons, resulting twistronics for photons, canalized phonon shear and tunable topological polaritons. However, the on-demand reconfigurability especially with magnetic dispersions, is restricted by weak natural anisotropy hence remains largely unexplored. Here, we show how origami fused artificial...

We design a tunable terahertz metasurface, which consists of two different trapezoid graphene ribbons patterned in opposite directions on gold film, separated by thin dielectric spacer. The kinds can cover nearly 2π phase shift with high reflection efficiency spectral regions so that the metasurface reflect frequency waves to totally directions. By changing Fermi level ribbons, response proposed be adjusted, and as result, spectrum splitting realized. present provides powerful way control...

Abstract Electromagnetic resonances in meta‐atoms have empowered optical interfaces with unprecedented abilities wavefront manipulation. Despite the versatile applications, energy efficiency and bandwidth improvement are still theoretically constrained by dispersion feature of mesoscopic structures. Here, a nontrivial phase modulation mechanism is exposed that breaks limit electric dipolar resonances. By arranging dipoles into tilted periodic arrays, time‐reversed scattering channels...

The single-phase-to-earth fault (SPTEF) current is weak in neutral ineffectively grounded systems. High impedance, noise and arc impair the feature, which increases difficulty of faulty feeder detection. Based on propagation characteristics zero-mode transients (ZTs), this paper proposes a detection criterion by utilizing amplitude information ZTs captured at both terminals. To conduct criterion, historical data recorded terminals each with bus collected. standard ratios frequency components...

Abstract Metasurfaces with engineered phase discontinuity offer extra degrees of freedom to control the angular spectrum characteristics light and can be used construct planar metalenses a variety anomalous functionalities. Here, off‐resonance spin‐locked metasurfaces empowered by quasi‐bound states in continuum are reported, order achieve concept hybridized analog computing over both frequency domains. By introducing two types asymmetric degrees, high‐quality resonance symmetry‐protected...

The detailed, high-resolution images captured by drones pose challenges to target detection algorithms with complex scenes and small-sized targets. Moreover, targets in unmanned aerial vehicle are usually affected factors such as viewing perspective, occlusion, light, which increase the difficulty of detection. In response above issues, we propose an improved SDMSEAF-YOLOv8 for based on YOLOv8, combined a Bi-directional Feature Pyramid Network, improve sensing ability model multiscale A...

Designing high-performance binder-free electrochemical electrodes is crucially important toward supercapacitors. In this paper, a Zn/N-doped porous carbon film coating on flexible nanotubes (ZIF-8@CT-800) derived from the epitaxial Zn-MOF growth cotton textile was successfully fabricated via combination of liquid-phase (LPE) method and calcination treatments. The ZIF-8@CT-800 serves directly as self-supported electrode for supercapacitors exhibits high areal capacitance 930 mF·cm

With the rapid development of wireless communication, requirements high-integration and low-cost radio frequency (RF) front-end modules in mobile phones result more usage silicon-on-insulator field effect transistors (SOIFETs) for manufacturing RF switches. However, nonlinear behavior SOIFET switches <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> -state always produces unwanted harmonics distortion interference when they are excited...

Zn-ion hybrid supercapacitors (ZHSCs) have been considered as a promising candidate for energy storage systems because of the merits they inherited from both and rechargeable batteries. Herein, we show eco-friendly modified solvent evaporation-induced self-assembly (EISA) synthesis newly engineered plant polyphenol tannin-derived ordered mesoporous carbons (TOMCs) employ them cathode material high-performance ZHSCs to promote diffusion dynamics Zn2+ ions first time. The optimized TOMC-700...

Developing two-dimensional (2D) hybrid nanosheet arrays integrating inorganic and organic components is highly significant for third-order nonlinear optical (NLO) applications. Herein, an oriented 2D porphyrin-based MOF (ZnTPyP(Co)) thin film composed of vertically stacked ultrathin nanosheets was fabricated via the liquid-phase epitaxial (LPE) layer-by-layer (LBL) method. The prepared ZnTPyP(Co) exhibits outstanding NLO response with a high susceptibility ∼2.63 × 10–7 esu, which ascribed to...

The operation of thyristor-based high-voltage direct current (HVDC) system requires abundant reactive power support. Synchronous condensers, as rotating devices with large capacity compensation, are generally utilized in HVDC systems. In this paper, the start-up control a synchronous condenser integrated electronics based static frequency converter (SFC) is investigated following 3 contributions: (1) Three different variable starting methods proposed regarding main component, SFC. (2)...

The magnetoelectric (ME) heterostructure is composed of ferromagnetic and ferroelectric materials. heterostructural ME effect originates from piezoelectric in the component magnetostrictive component. has higher coupling coefficient lower dielectric loss than particulate composites, thus leading to several promising applications such as magnetic field sensors, energy harvesters, antenna memory devices. In this paper, we review recent research progress for device applications, present a...

Spatial frequency filters, which can manipulate the angular spectrum of incident electromagnetic waves, are significantly important in optical analog processing. Here, magnetic metamirrors with symmetric split-ring resonators, used to achieve short circuit for normally wave and impedance matching obliquely wave, fabricated investigated. Our proposed be considered as high-stop spatial their operation mechanisms further revealed by coupled-mode theory equivalent transmission line model. The...

A voltage-variable capacitor is an essential part of the matching element in radio frequency (RF) circuits, including transmitting and receiving channel mobile devices. However, nonlinear characteristic produces unwanted harmonics when driven by a large exciting signal, which causes electromagnetic radiation spurious emission (RSE) complications. This article presents efficient capacitance polynomial model method coupling with test systems to predict behavior capacitor. In addition, simple...

AbstractRefill friction stir spot welding (RFSSW) is applied in various industrial areas. Herein, we developed a hot-pressing post-treatment method for improving the shear strength of an Al 1060–carbon fiber–reinforced plastic joint by >40%. The strengthening effect treatment was based on reinforced micro-mechanical interlocking mechanism and infiltration melted thermoplastic epoxy into layer. Exploring such high-strength made dissimilar materials would open novel route RFSSW process...

Abstract Chiral metamaterials with artificially engineered subwavelength structures can effectively couple incident waves and lead diverse electromagnetic responses to various circular polarizations. Here, we designed fabricated an origami-inspired reconfigurable three-dimensional (3D) chiral metamaterial, whose dichroism be dynamically controlled by simple mechanical stretch of its bonded elastomer substrate. The metamaterial was obtained from a patterned planar achiral metasurface through...