We propose an ultranarrow bandwidth perfect infrared absorber consisting of a metal periodic structured surface with nanoslits, spacer dielectric, and back plate. Its aborption are respectively about 8 nm 95%. The thickness the nanobars spacer, width nanoslits primary factors determining absorption performance. This structure not only has narrow but also can obtain giant electric field enhancement in tiny volume nanoslits. Operated as refractive index sensor, this figure merit high 25. It...

Abstract The photonic spin Hall effect, originating from spin–orbit interactions, has attracted considerable research interest due to its potential for applications in spin‐controlled nanophotonics. However, most efforts have focused only on 1D modulation, including transverse or longitudinal spin‐dependent splitting. Here, a novel method is proposed multidimensional splitting single‐layer dielectric metasurface. Due the interplay of Pancharatnam–Berry phase and dynamic phase, focusing...

We show the existence of a flatband consisting photonic zero modes in gain and loss modulated lattice system as result underlying non-Hermitian particle-hole symmetry. This general finding explains previous observation parity-time symmetric systems where symmetry is hidden. further discuss defect states these systems, whose emergence can be viewed an unconventional alignment pseudospin under influence complex-valued pseudomagnetic field. These also behave chain with two types links, one...

In the article authors discuss light detection and ranging (LiDAR) for automotive applications potential roles Si photonics can play in practice. The review published research work on optical phased array (OPA) other relevant devices past decade with in-depth technical analysis respect to practical system design considerations. commercialization status of certain LiDAR technologies is briefly introduced.

While deep learning has demonstrated tremendous potential for photonic device design, it often demands a large amount of labeled data to train these neural network models. Preparing requires high-resolution numerical simulations or experimental measurements and cost significant, if not prohibitive, time resources. In this work, we present highly efficient inverse design method that combines networks with genetic algorithm optimize the geometry devices in polar coordinate system. The...

In 2018, China implemented the Veterinary Antimicrobial Use Reduction Action to curb rapid development of antibiotic resistance (AR). However, AR-related pollutions in animal farms after reduction policy has been poorly investigated. Here, we performed a comprehensive investigation combining UPLC-MS/MS, metagenomic, and bacterial genomic analyses eight representative large-scale chicken Guangdong, China. Our results showed that antibiotics ARGs contaminations were more severe broiler than...

Abstract Angular momentum (AM), one of the most basic physical properties light, has attracted great interest scientific community due to its significant values in high‐capacity optical communication. To realize AM multiplexing and demultiplexing, methods based on metallic metasurface are proposed, which suffers from huge Ohmic losses. Besides, additional coupling elements necessary for output light into single‐mode waveguides. Here, an efficient focused demultiplexing system dielectric...

This study contributes to the existing body of knowledge by examining nonlinear impact remittance inflow on green growth. To analyze short and long-run estimates, we have relied autoregressive distributed lag quantile models. The use models growth is an innovative approach that adds this topic. results from suggest a positive shock in improves growth, while negative reduces Moreover, foreign direct investment, research development activities, environmental technology, financial encourage In...

In modern manufacturing, cameras are widely used to record the full workflow of assembly line workers, enabling video-based operational analysis and management. However, these recordings often excessively long, leading high storage demands inefficient processing. Existing keyframe extraction methods typically apply uniform strategies across all frames, which ineffective in detecting subtle movements. To address this, we propose a method tailored for videos, combining optical flow estimation...

ABSTRACT A novel major facilitator superfamily (MFS) efflux pump in Staphylococcus , designated Nms, was identified via topology prediction. The secondary structure indicated the presence of 12 transmembrane segments (TMSs) and characteristic motif MFS pumps. Experimental verification activity conducted using ethidium bromide accumulation assays biofilm formation assays. Antimicrobial susceptibility testing inhibition confirmed that Nms effectively effluxed various antimicrobial agents to...

We propose an all-dielectric metasurface for simultaneously controlling phase and amplitude at the subwavelength scale. Based on Pancharatnam–Berry Fabry–Pérot resonance, variations of can cover 0–2π 0–1, respectively. Moreover, polarization conversion efficiency purity reach up to 88 94%, By this method, a vortex beam generator with controllable topological charges amplitudes is successfully designed. The proposed provides effective method complete control amplitude, which be used...

We proposed a mode splitter based on directional coupler (DC), which is capable of splitting the TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> modes without changing order. It found that high coupling efficiency (higher than -1 dB), low crosstalk (less -16 wide bandwidth (~100 nm), large fabrication tolerance (±10 nm) can be obtained by 24.4 μm length DC structure, composed...

LiDAR has attracted increasing attention because of its strong anti-interference ability and high resolution. Traditional systems rely on discrete components face the challenges cost, large volume, complex construction. Photonic integration technology can solve these problems achieve integration, compact dimension, low-cost on-chip solutions. A solid-state frequency-modulated continuous-wave based a silicon photonic chip is proposed demonstrated. Two sets optical phased array antennas are...

We have proposed and investigated two kinds of waveguide systems (i.e., dielectric-dielectric-metal dielectric-metal-dielectric waveguides) which are able to support low-loss slow-light guided mode at telecommunication regime 1.55 μm. Simulation results demonstrate that the propagation length waveguides is as long tens or even hundreds micrometers, more than ten times higher traditional metal-dielectric-metal waveguides. Moreover, better slow light performance a figure merit can reach value...

A silicon nitride (Si3N4)-based reverse strip/slot hybrid waveguide with single vertical silica slot is proposed to acquire extremely low and flat chromatic dispersion profile. This achieved by design optimization of the geometrical structural parameters waveguide. The varying between ±10 ps/(nm·km) obtained over 610 nm bandwidth. Both effective area nonlinear coefficient across entire spectral range interest are investigated. led an on-chip supercontinuum (SC) source −30 dB bandwidth 2996...

Structural colors engineering as a promising research area provides high-resolution and environmental-friendly sustainable implementation. Here, metasurface-based concept was used to design waveguides gratings of Si 3 N 4 material on silicon dioxide substrates. The shift reflection peaks can be controlled by structural parameters efficiencies exceeded 90% with half height width less than 10 nm. This induced color superior saturation. Moreover, such nanostructures showed good sensitivity...

Abstract Ultralong ZnO piezoelectric‐fine‐wires (PFWs) with a perfect hexagonal structure have been prepared by an upstream growing chemical vapor deposition (CVD) method. Furthermore, isolatable and flexible piezoelectric strain sensors based on individual PFWs fabricated simple reliable technique. The whole device was fully packaged epoxy polymeric resin (EPR). I–V characteristic of the sensor is highly sensitive to applied it, which well interpreted in terms variation Schottky barrier...

We have proposed and investigated micro-ring add-drop switch M-Z interferometric element for on-chip router applications based on silicon hybrid plasmonic waveguide. The waveguide possesses lower propagation loss compared with conventional metal-insulator-metal By employing this low waveguide, it is found that the ring high transmission efficiency (-1 dB), extinction ratio can be as 30 dB at 1.556 <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Micro-electrical discharge machining (EDM) milling with a simple-shaped electrode is an effective method to fabricate three-dimensional micro parts and structures. However, the serious wear occurring in process significantly deteriorates geometrical accuracy of products. Since micro-EDM inevitable hard model accurately, it difficult conduct compensation. To enhance quality efficiency milling, large layer thickness introduced improved compensation for monolayer proposed based on modification...

We investigate the impact of two-photon absorption (TPA) and free-carrier effects on all-optical logic gates in silicon waveguides, which conversion efficiency is greatly reduced waveform seriously distorted. A silicon–organic hybrid dual-slot waveguide without TPA proposed for could offer an extremely large nonlinear parameter higher than 1.4 × 107 W−1 km−1. The AND, OR, XOR based four-wave mixing this are realized 100 Gb s−1 data signals C-band. These results provide potential applications...