Valley kink states and valley-polarized chiral edge states, whose topologically protected properties have great application potential in high-speed information processing communication, recently become important frontiers topological photonics. However, valley photonic insulators mainly support single-type through breaking lattice spatial symmetry. It remains difficult for different types of to coexist a specific system. In this paper, we propose judiciously designed substrate-integrated...

Topological photonics has become a new and fascinating area in recent years, which enables electromagnetic waves to propagate with negligible backscattering excellent robustness even when encountering sharp corners or defects. But the flexible tunability of edge corner states is challenging once topological photonic crystals (PhCs) have been fabricated. In this paper, we propose all-dielectric PhC C3 symmetry constructed by hexagonal array petal-like aperture embedded silicon background. The...

Abstract Topological valley transport in photonic crystals (PCs) has attracted great attention owing to its edge modes immune backscattering. However, flexibly dynamically controlling and reconfiguring the pathway of topological one-way propagation is still challenging. Here, we propose a tunable programmable PC structure based on nematic liquid (LCs). Inversion symmetry breaking transition are implemented through relative permittivity LC cells. protection states valley-locked beam splitting...

In this Letter, an optically transparent and broadband absorber designed using a multi-objective genetic algorithm (MOGA) is proposed. The absorption of the multilayer lossy frequency selective surface-based calculated by equations equivalent circuit models. To solve problem unbalanced structure bandwidth thickness, used for optimizing geometric sheet resistance parameters structure. A with 90% covering range 2–18 GHz (S-band to Ku-band) developed based on MOGA design method optical...

In this letter, a broadband switchable active frequency selective surfaces (AFSSs) is presented, and the proposed structure comprised of three metallic layers two Rogers RT5880 substrates. order to realize transmission, second-order bandpass filter constructed, multilayer coupling effect utilized. A modified equivalent circuit model p-i-n diode reduce simulation error improve design accuracy. By controlling bias voltage diodes, completely different functions are realized. At function...

A circular-polarized vortex beams generation with orbital angular momentum (OAM) based on a leaky-wave antenna (LWA) substrate integrated waveguide is proposed in this letter. The loop LWA designed to transmit various OAM modes controlled by the operating frequency. With frequency change from 11 12 GHz, accordingly. realizes low profile use of structure. Meanwhile, two transverse slots and one longitudinal slot are utilized realize circular polarization improve mode purity OAM. Notably,...

Electromagnetic topological chiral edge states mimicking the quantum Hall effect have attracted a great deal of attention due to their unique features free backscattering and immunity against sharp bends defects. However, matching techniques between classical waveguides one-way waveguide deserve more for real-world applications. In this paper, highly efficient conversion structure rectangular is proposed demonstrated at microwave frequency, which efficiently converts guided waves states. A...

Abstract Topological valley-locked edge states have been attracting much attention in terahertz (THz) and optical regimes due to their unique unidirectional backscattering-immune feature. However, these one-dimensional transports are essentially not compatible traditional waveguides or devices. In this work, we propose a THz topological waveguide supporting two dimensional surface waves based on designer plasmon crystals. The is implemented by designing sandwich-like A|C|B heterostructure...

Valley kink states and valley-polarized chiral edge states, whose topologically protected one-way propagation property provides a promising solution for manipulating light waves, have recently attracted considerable attention in topological photonics. However, it remains great challenge to realize flexibly tunable dispersion two different develop dynamically controllable photonic platform switching wave routing. In this work, we propose reconfigurable routing structure the telecommunication...

In this letter, a novel synthesis method for broadband multilayer absorber based on multi-objective genetic algorithm (MOGA) is proposed. The inhomogeneous medium can be equivalent to homogeneous using the effective theory, and absorption of calculated. A MOGA introduced optimize geometric parameters absorber. Compared with design results two existing methods, total thickness structure designed reduced by 10.8% 9.1%. addition, wide-angle 90% bandwidth covering 2–18 GHz method, only 0.133...

Valley Hall topological photonic crystals, inspired by insulators in condensed matter physics, have provided a promising solution to control the flow of light. Recently, dynamic manipulation property crystals has been widely studied. Here, we propose novel for programmable valley called field edge array (FPTEA), based on reorientation nematic liquid and robust valley-protected modes. FPTEA is composed an graphene-like lattices with C 3 symmetry, which birefringence crystal larger than...

A compact MIMO antenna with high isolation and a small size of 25×89 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> is presented. The proposed consists two planar-monopole antennas which capable covering 890-960 MHz 1.88-2.69 GHz. To increase the for operation bands, slot on ground parasitic elements are used. Both simulation measurement results show between over 10 dB, all measured good candidate portable applications.

Topological chiral edge states in photonic Chern insulators, which exhibit the one-way propagation property with reflection-free behavior and excellent robustness against perturbations, have become an important frontier topological photonics. Currently, there been many studies on its robust behavior, but few focused radiation properties. In developing functional devices (e.g., antennas) for real-world applications, studying traveling-wave characteristics based deserves more attention. this...

&lt;abstract&gt; &lt;p&gt;The accurate diagnosis and treatment of gliomas depends largely on the understanding P53 gene status. In our study, we presented a robust deep learning model, CTD-RegNet (improved RegNet integrating CNN, vision transformer, truth discovery), tailored for predicting status in gliomas. Our model addressed common challenges existing models, such as incomplete feature extraction uncertainty. First, used network basis mutations by skillfully extracting heterogeneous...

<sec> <title>BACKGROUND</title> Classifying brain tumors preoperatively provides essential information for guiding treatment plans. However, existing classification methods require manual intervention which often suffer from efficiency and accuracy issues. </sec> <title>OBJECTIVE</title> The objective of our study was to Improve the tumor grading or classification. This shows that method is help clinicians diagnose formulate <title>METHODS</title> Our proposed uses a DenseNet-ResNet based...