Ultrathin broadband terahertz metamaterial based on single-layer nested patterned graphene

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130262 - 130262

Опубликована: Янв. 1, 2025

Язык: Английский

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Design and Analysis of Dual-Band Metasurface Filter for Pulse Waves Based on Capacitive Nonlinear Circuits

Electronics, Год журнала: 2025, Номер 14(3), С. 603 - 603

Опубликована: Фев. 4, 2025

In this paper, a novel dual-band metasurface filter (MSF) designed for accurately differentiating pulse waves (PWs) and continuous (CWs) is proposed, which based on complementary cross resonator (CSR) structure adhered dielectric substrate integrated with capacitive nonlinear circuit. The unit cell of the MSF comprises two identical CSR structures: one circuits configured in parallel capacitor (C1) within structure. These structures loaded are fabricated substrate. simulation outcomes reveal that, normally incident CWs an input power 10 dBm, transmittance reaches as high 97.1% at 2.0 GHz 93.9% 3.45 GHz. contrast, when it comes to 50 ns short PWs, remains consistently below 6% throughout entire frequency range from 1 5 addition, PWs increases significantly width widens aforementioned discrete frequencies. ensuing data corroborates that −15 15 difference between first rises then falls increases. Specifically, specified dBm angle oblique incidence ranges 0° 60°, context TE TM modes, exceeds 80% around both GHz, while 15%. Finally, effects resistance capacitance also studied. proposed herein showcases its potential applications wireless communication well realm anti-electromagnetic interference. electromagnetic (EM) waveform modulation band 1–5 has great development prospects low-frequency working fields such radar antennas EM protection.

Язык: Английский

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Ultra-broadband plasmonic perfect metamaterial absorber based on all-dielectric triple-vertical-ring nanostructure MXene for full-spectrum solar energy

Physica B Condensed Matter, Год журнала: 2025, Номер unknown, С. 417205 - 417205

Опубликована: Апрель 1, 2025

Язык: Английский

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Polarization-Insensitive, High-Efficiency Metasurface with Wide Reception Angle for Energy Harvesting Applications

Sensors, Год журнала: 2025, Номер 25(2), С. 429 - 429

Опубликована: Янв. 13, 2025

This research presents an innovative polarization-insensitive metasurface (MS) harvester designed for energy harvesting applications at 5 GHz, capable of operating efficiently over wide reception angles. The proposed MS features a novel wheel-shaped resonator array whose symmetrical structure ensures insensitivity to the polarization incident electromagnetic (EM) waves, enabling efficient absorption and minimizing reflections. Unlike conventional designs, achieves near-unity efficiency, exceeds 94% under normal incidence, maintains superior performance across various angles TE TM polarizations. To validate design, × 5-unit cell was fabricated experimentally tested, demonstrating excellent agreement between simulation measurement results. work significantly advances metasurface-based by combining insensitivity, wide-angle high absorption, making it compelling solution powering wireless sensor networks in next-generation applications.

Язык: Английский

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Tunable terahertz filter using graphene for refractive index sensing

Diamond and Related Materials, Год журнала: 2025, Номер unknown, С. 111982 - 111982

Опубликована: Янв. 1, 2025

Язык: Английский

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Dual-band Flexible Plasmonic Metasensors for Ultrasensitive Terahertz Biomedical Sensing

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137480 - 137480

Опубликована: Фев. 1, 2025

Язык: Английский

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A broadband absorber based on W-TiO2 ellipsoidal core-shell array structure

Physica B Condensed Matter, Год журнала: 2025, Номер unknown, С. 417077 - 417077

Опубликована: Фев. 1, 2025

Язык: Английский

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A numerical approach for optimizing ultrawideband absorber performance with MXene multilayer metamaterials for solar engineering applications

Applied Physics A, Год журнала: 2025, Номер 131(4)

Опубликована: Март 3, 2025

Язык: Английский

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Design of an Ultra‐Wideband and Wide‐Angle Absorber Based on ITO‐FSA for EM Stealth

Microwave and Optical Technology Letters, Год журнала: 2025, Номер 67(3)

Опубликована: Март 1, 2025

ABSTRACT In this letter, an electromagnetic stealth composite superlattice‐type structure based on indium tin oxides (ITO) resistive film and frequency selective absorber (FSA) is proposed for radar cross section (RCS) reduction. It exhibits impressive ultra‐wideband performance with absorption of more than 85% (RCS reduction 8.2 dB) spanning from 0.94 to 23.2 GHz (relative bandwidth 184.8%). The also polarization‐insensitive has angular incidence stability up 45° 60° TE TM polarizations, respectively. Additionally, it demonstrates excellent miniaturization characteristics, a cell size only 0.15 λ L × 0.09 , which provides technical solution research application in related fields.

Язык: Английский

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Graphene-based compact polarization-insensitive broadband terahertz absorber for sensing applications

Frequenz, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract This paper presents a compact broadband absorber designed for sensing applications at terahertz frequencies. The proposed design includes dielectric material, metallic ground plane made of copper, and graphene-based elliptical slot-loading rectangular resonator. unit cell the measures dimensions 6 μm × μm. demonstrates remarkable absorption characteristics, with over 90 % across wide frequency spectrum 0–18 THz. At 12.2 THz, performance is nearly perfect, an rate 99.9 %. Further, has symmetric design, facilitating it to be insensitive polarization. It possesses stable characteristics both Transverse-Electric (TE) Transverse-Magnetic (TM) waves incidence angle ( θ ) ≥ 40°. Additionally, suggested analysed regard effects various analyte materials as well modifications in graphene characteristics. outperforms previously reported THz absorbers terms relative bandwidth, peak, oblique stability, overall volume.

Язык: Английский

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