A5016448655- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Plasmonic and Surface Plasmon Research
- Electromagnetic Scattering and Analysis
- Photonic and Optical Devices
- Antenna Design and Analysis
- Electromagnetic Simulation and Numerical Methods
- Photonic Crystals and Applications
- Microwave Engineering and Waveguides
- Optical Coatings and Gratings
- Electromagnetic Compatibility and Measurements
- Supercapacitor Materials and Fabrication
- Electromagnetic wave absorption materials
- Advanced Fiber Optic Sensors
- Advancements in Battery Materials
- Electromagnetic Compatibility and Noise Suppression
- Advanced Sensor and Energy Harvesting Materials
- Orbital Angular Momentum in Optics
- Low-power high-performance VLSI design
- Graphene research and applications
- Heme Oxygenase-1 and Carbon Monoxide
- Lightning and Electromagnetic Phenomena
- Advanced Fiber Laser Technologies
- VLSI and FPGA Design Techniques
- Thermal Analysis in Power Transmission
Nanjing University of Aeronautics and Astronautics
2016-2025
Changchun Normal University
2022-2024
University of Electronic Science and Technology of China
2014-2024
Southeast University
2006-2023
Beijing Institute of Technology
2010-2023
Beijing Institute of Optoelectronic Technology
2010-2023
Nantong University
2023
Fudan University
2022
China University of Geosciences (Beijing)
2022
Nankai University
2022
We report the superior capacitance of functionalized graphene prepared by controlled reduction oxide (GO). In a solvothermal method, GO dispersed in dimethylformamide (DMF) was thermally treated at moderate temperature (150 °C), which allows fine control density functionalities. Surface functionalities on would enable high pseudocapacitance, good wetting property, and acceptable electric conductivity. A specific up to 276 F/g achieved based discharge current 0.1 A/g 1 M H2SO4 electrolyte, is...
properties of the optical surface plasmons in microwave and terahertz frequencies using subwavelength artificial structures to construct negative permittivity.The spoof also benefit from realization ultrathin corrugated metallic strips [14], as they are compatible with printed circuit boards (PCBs) integrated technologies.Since propagating localized were experimentally realized PCBs 2013 2014 [14, 15], this area flourishes prospective applications emerging circuits, sensing, wireless...
Graphene can be used as a platform for tunable absorbers its tunability of conductivity. In this paper, we proposed an "uneven dielectric slab structure" the terahertz (THz) absorber based on graphene. The consists graphene-dielectric stacks and electric conductor layer, which is easy to fabricate in manufacturing technique. Fine tuning absorption resonances conveniently achieved by adjusting bias voltage. Both narrowband broadband made structure are demonstrated without using patterned...
Abstract In this work, a broadband and broad-angle polarization-independent random coding metasurface structure is proposed for radar cross section (RCS) reduction. An efficient genetic algorithm utilized to obtain the optimal layout of unit cells get uniform backscattering under normal incidence. Excellent agreement between simulation experimental results show that can significantly reduce more than 10 dB from 17 GHz 42 when angle incident waves varies 10° 50°. The provides an scheme...
Stretchable radio‐frequency electronics are gaining popularity as a result of the increased functionality they gain through their flexible nature, impossible within confines rigid and planar substrates. One approach to fabricating stretchable antennas is embed or flowable conductive materials, such polymers, polymer composites, liquid metal alloys conduction lines. However, these materials face many challenges, low electrical conductivity under mechanical deformation delamination from In...
In this work, a metasurface acting as linear polarization rotator, that can efficiently convert linearly polarized electromagnetic waves to cross within an ultra wide frequency band and with broad incident angle, is proposed. Based on the electric magnetic resonant features of unit cell, composed by double-head arrow, cut-wire, two short V-shaped wire structures, three resonances, which lead bandwidth expansion cross-polarization reflections, are generated. The simulation results show...
Abstract Low‐cost activated carbons with high capacitive properties remain desirable for supercapacitor applications. Herein, a three‐dimensional scaffolding framework of porous carbon nanosheets (PCNSs) has been produced from typical biowaste, namely, ground cherry calyces, the specific composition and natural structures which have contributed to PCNSs having very large surface area 1612 m 2 g −1 , hierarchical pore size distribution, turbostratic structure degree graphitization, about 10 %...
To design conformally invisible cloaks for arbitrarily shaped objects, we use the nonuniform rational B -spline (NURBS) to represent geometrical modeling of arbitrary object. Based on method optical transformation, analytical formulas permittivity and permeability tensors are proposed cloaks. Such can be easily implemented in Full-wave simulations given heart-shaped perfectly electrical conducting (PEC) which observe that power-flow lines incoming electromagnetic waves will bent smoothly...
In this work, we demonstrate that composite spoof surface plasmon polaritons can be excited by coplanar waveguide, which are composed of two different (SSPPs) modes propagating along a periodically corrugated metallic thin film simultaneously. These SSPPs correspond to the dominant one-dimensional (1D) periodical hole and groove arrays separately. We have designed simulated planar plasmonic waveguide in microwave frequencies, simulation results show achieve multi-channel signal transmission...
Aluminum electrolytic capacitors (AECs) are widely used for alternating current (ac) line-filtering. However, their bulky size is becoming more and incompatible with the rapid development of portable electronics. Here we report a scalable process to fabricate miniaturized graphene-based ac line-filters on flexible substrates at room temperature. In this work, graphene oxide (GO) reduced by patterned metal interdigits temperature directly as electrode material. The as-fabricated device shows...
Traditional plasmons in a metal enable light to be focused beyond the diffraction limit, but large dissipative losses at optical frequencies seriously limit practical applications. Taking advantage of structural dispersion waveguide modes below cutoff frequency, authors experimentally realize propagation effective surface using conventional...
In this letter, dual-band trapping of spoof surface plasmon polaritons (SSPPs) is realized by a simple waveguide (SPW), which takes the form microstrip line with periodic holes. A tapered gradient holes built for efficient mode conversion between quasi-transverse electromagnetic waves in common and SSPPs on SPW. It interesting to note that negative group velocity can be clearly observed first high-order such SPW due strong coupling corrugated ground. curved same also investigated testing its...
The intricate dynamic feedback mechanisms involved in bone homeostasis provide valuable inspiration for the design of smart biomaterial scaffolds to enhance situ regeneration. In this work, we assembled a biomimetic hyaluronic acid nanocomposite hydrogel (HA-BP hydrogel) by coordination bonds with bisphosphonates (BPs), which are antiosteoclastic drugs. HA-BP exhibited expedited release loaded BP response an acidic environment. Our vitro studies showed that inhibits mature osteoclastic...
Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit practical applications of plasmonic waveguides. In this paper, we introduce concept dielectric spoof SPs (SSPs) show that subwavelength high-contrast gratings (HCGs) offer a route to effectively suppress hence dramatically increase length electromagnetic waves. We experimentally realized wideband ultra-low-loss high-confinement waveguide...
Abstract Backward phase matching, which describes counterpropagating fundamental and harmonic waves in a negative‐index medium, is one of the most intriguing phenomena nonlinear metamaterials. Predicted theoretically decades ago, however, it still challenging task to be applied for efficient second (SH) generation metamaterial with ultrathin geometry ultralow loss. Here, spoof plasmonic reported, composed an symmetrical corrugated metallic strips loaded active devices. The simulated measured...
Abstract In this work, we propose an ultra-wideband and wide-angle optically transparent flexible metamaterial absorber (MMA), consisting of a multilayered structure with polyvinyl chloride layer periodic indium-tin-oxide patch array attached to polyethylene terephthalate film layer. The absorptivity the proposed MMA reaches above 90% from 5.61 29.17 GHz whether it is flat or even bent 60º thanks flexibility materials. Excellent agreement between measured simulated results verify our design....
Time photonic crystals are media in which their electromagnetic parameters modulated periodically time, showing promising applications non-resonant lasers and particle accelerators, among others. Traditionally utilized to study space crystals, topological band theory has also been translated recently analyze time with inversion symmetry, enabling the construction of temporal version edge states. However, disorders can readily break symmetry practice, hence likely destroying states associated...
Abstract This paper presents a design strategy for highly compact filters based on λ_g/4 effective localized surface plasmons (ELSPs). Leveraging the robustness of ELSPs to their cross-sectional shapes, proposed facilitates easier integration into printed circuit boards (PCBs). However, challenges such as dielectric material stacking and excessive lateral dimensions remain. By employing ELSPs, longitudinal size ELSPs-based is significantly reduced. Furthermore, embedding directly PCB...