Weiqi Cai

ORCID: 0000-0002-3539-3321
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About
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Research Areas
  • Metamaterials and Metasurfaces Applications
  • Advanced Antenna and Metasurface Technologies
  • Antenna Design and Analysis
  • Plasmonic and Surface Plasmon Research
  • Quantum optics and atomic interactions
  • Terahertz technology and applications
  • Antenna Design and Optimization
  • Electromagnetic wave absorption materials
  • Molecular Junctions and Nanostructures
  • Structural Analysis and Optimization
  • Photonic Crystals and Applications
  • Microwave Engineering and Waveguides
  • Advanced Memory and Neural Computing
  • Advanced Materials and Mechanics
  • Photonic and Optical Devices
  • Quantum-Dot Cellular Automata
  • Orbital Angular Momentum in Optics
  • Structural mechanics and materials
  • Electromagnetic Compatibility and Measurements

AviChina Industry & Technology (China)
2023-2024

Northwestern Polytechnical University
2017-2023

Ministry of Industry and Information Technology
2021-2023

Abstract The construction of lightweight yet robust, durable magnetic transition metal carbides and/or nitride (MXene) aerogels is highly desired for assembling high‐performance, multifunctional architectures. However, the fabrication and application MXene severely restricted by their inferior mechanical strength poor water/oxygen resistance. Here, sustainable cellulose nanofibrils (CNFs) are employed assisting in physical chemical dual cross‐linking to strongly bind MXenes MOF‐derived...

10.1002/adfm.202401687 article EN Advanced Functional Materials 2024-04-01

We demonstrate an electrically biased reconfigurable chiral metasurface for controlling the polarization conversion and asymmetric transmission in a broadband manner. The is constructed with coupled three-layer complementary split-ring resonator (CSRR) arrays loaded tunable electronic components to achieve dynamic control of coupling CSRRs by simply tuning external voltage on structure. It found that can be effectively continuously tuned both experiments simulations frequency range....

10.1039/d2na00382a article EN cc-by-nc Nanoscale Advances 2022-01-01

The Brewster effect, dating back to the pioneering work of Sir David in 1815, offers a crucial route achieve 100% energy conversion between incident and transmitted propagating waves at an optical interface is fundamental importance many practical applications, such as polarization filtering, beam steering, broadband angular selectivity. However, whether effect surface can be implemented without involvement negative-permittivity or negative-permeability materials remains elusive. This due...

10.1021/acsphotonics.4c02263 article EN ACS Photonics 2025-03-30

The active control of electromagnetic response in metamaterial and mutual coupling between resonant building blocks is fundamental importance realizing high-quality metamaterials. In this work, we propose experimentally demonstrate the tunabilities symmetry-broken metasurfaces made orthogonal electric dipolar resonators. metasurface with vertical horizontal wires integrated a PIN diode for control. It found that electromagnetically induced transparency (EIT)-like spectrum appears due to...

10.1364/prj.7.000955 article EN Photonics Research 2019-08-05

We investigate the electrically tunable Electromagnetic induced transparency (EIT)-like effect of active metamaterial structures composed a wire and split ring resonator by simulation, experiment, temporal coupled-mode theory. It is illustrated that an EIT-like appears as result weak coupling between bright dark resonators. Around peak frequency, superradiant resonance mode highly suppressed subradiant resonator, high transmittance well large group delay manifested. By integrating varactor...

10.1063/1.4984596 article EN Applied Physics Letters 2017-05-29

Artificial resonant metamaterial with subwavelength localized filed is promising for advanced nonlinear photonic applications. In this article, we demonstrate enhanced frequency-agile response and hysteresis tunability in a Fano-resonant hybrid metamaterial. A ceramic cuboid electromagnetically coupled metal cut-wire structure to excite the high-Q mode dielectric/metal It found that significant of can be employed realization tunable metamaterials by exciting its magnetic mode, trapped an...

10.34133/2021/9754083 article EN cc-by Research 2021-01-01

We theoretically and experimentally studied the coupling of magnetic Mie resonance a dielectric cuboid guide mode an alumina slab in all-dielectric metamaterial. It is found that excitation discrete or substrate can be properly controlled by designing geometry cuboid. Moreover, it tailored to achieve electromagnetically induced transparency (EIT)--like spectrum. The tunability EIT-like spectrum based on geometric parameters was also studied. Our results utilizing crucial contribution derive...

10.1103/physreva.100.053804 article EN Physical review. A/Physical review, A 2019-11-04

Abstract Active control of metamaterial properties is great significance for designing miniaturized and versatile devices in practical engineering applications. Taking advantage the highly temperature-dependent permittivity water, we demonstrate a water-based comprising water cubes with thermally tunable Mie resonances. The dynamic tunability was investigated via numerical simulations experiments. A cube exhibits both magnetic electric response frequency range interest. primarily dipole...

10.1038/s41598-019-41681-5 article EN cc-by Scientific Reports 2019-04-01

The Brewster effect, dating back to the pioneering work of Sir David in 1815, offers a crucial route achieve 100% energy conversion between incident and transmitted propagating waves at an optical interface is fundamental importance many practical applications, such as polarization filtering, beam steering, broadband angular selectivity. However, whether effect surface can be implemented without involvement negative-permittivity or negative-permeability materials remains elusive. This due...

10.48550/arxiv.2409.08455 preprint EN arXiv (Cornell University) 2024-09-12

Metamaterial analogue of electromagnetically induced absorption (EIA) has promising applications in spectroscopy and sensing. Here we propose an EIA metamaterial based on hybrid metal/dielectric structures, which are composed a metallic wire dielectric block, investigate the EIA-like effect by simulations, experiments, two-oscillator model. An emerges virtue near-field coupling between block exhibiting magnetic dipolar resonance makes major contribution to absorption. The flux through...

10.1364/oe.393558 article EN cc-by Optics Express 2020-05-20

Abstract Dielectric metamaterials are promising for significantly enhanced optical nonlinearity their strongly localized Mie-resonant mode. Here, we theoretically and experimentally studied a hybrid metamaterial exhibiting extraordinary transmission (EOT) behavior, in which the amplitude frequency can be modulated. The EOT of perforated metal sheet with subwavelength aperture is induced dielectric cuboid by setting them close proximity exploiting first-order electromagnetic wave effectively...

10.1088/1361-6463/ac5082 article EN Journal of Physics D Applied Physics 2022-01-31

The active control to the local resonant mode of metasurface is a promising route for improving operation bandwidth limitation metasurface. Here, we propose and experimentally demonstrated tunabilities in frequency-agile Fano-resonant with pair asymmetric split ring resonators integrated double varactor diodes sharp Fano resonance. It found that Fano-type spectrum appears due near-field interferences between collective electric magnetic dipole modes. physical insight revealed through field...

10.3389/fphy.2021.739465 article EN cc-by Frontiers in Physics 2021-09-03

10.1109/ifeea64237.2024.10878752 article EN 2020 7th International Forum on Electrical Engineering and Automation (IFEEA) 2024-11-22

10.1109/csrswtc64338.2024.10811638 article EN 2021 Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC) 2024-11-04

Dielectric metamaterials with low ohmic losses and resonating in the local magnetic mode are preferable for enhancing material non-linearity. Here, we propose experimentally demonstrate broadband extraordinary electromagnetic transmission (EET) behavior, which is induced by coupling of modes two ceramic cuboids. It shown that behavior through a perforated metal sheet subwavelength aperture can be achieved exciting first-order Mie resonant these Our findings indicate bandwidth amplitude...

10.3389/fmats.2023.1207156 article EN cc-by Frontiers in Materials 2023-06-05
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