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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Perfect absorption properties of a near-infrared super-surface perfect absorber based on a multilayer subwavelength array structure

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130395 - 130395

Опубликована: Фев. 1, 2025

Язык: Английский

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Dynamic Optical Tuning and Sensing in L-Shaped Dirac Semimetal-Based Terahertz Metasurfaces

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130419 - 130419

Опубликована: Март 1, 2025

Язык: Английский

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Ultra-broadband Absorber and Near-perfect Thermal Emitter based on Multi-layered Grating Structure Design

Energy, Год журнала: 2025, Номер unknown, С. 134594 - 134594

Опубликована: Янв. 1, 2025

Язык: Английский

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Terahertz bands multifunctional metamaterial transmission-absorption switching device based on vanadium dioxide

Dalton Transactions, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

In this paper, a vanadium dioxide (VO2)-based terahertz device is proposed to realize the conversion between broadband absorption and transmission functions, including VO2 bottom layer, dielectric layer pattern in three-layer structure. With change of conductivity, metamaterial can switch transmission. When exhibits transmission, it has high transmittance 90% for waves 5.6 THz 8.7 frequency band. absorption, 3.66 9.98 Furthermore, with increasing peak decreases from 93.8% 0% increases 1% 99.5%. The impedance matching theory invoked physical mechanism elucidated by analyzing surface electric field device. By studying characteristics different incidence polarization angles, insensitive good performance over large angles. Compared other absorbers metamaterials, structure study unique design diverse functions play an important role various fields such as communications, electromagnetic stealth, sensors, thermal emission devices.

Язык: Английский

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Actively Tunable Multi-Frequency Narrowband Terahertz Absorber Using Graphene Metamaterials

Optics Communications, Год журнала: 2025, Номер unknown, С. 131768 - 131768

Опубликована: Март 1, 2025

Язык: Английский

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A fully symmetric solar absorber for thermophotovoltaic power generation

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130461 - 130461

Опубликована: Март 1, 2025

Язык: Английский

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Localized Effects in Graphene Oxide Systems: A Pathway to Hyperbolic Metamaterials

Photonics, Год журнала: 2025, Номер 12(2), С. 121 - 121

Опубликована: Янв. 29, 2025

Graphene oxide (GO) has emerged as a carbon-based nanomaterial providing different pathway to graphene. One of its most notable features is the ability partially reduce it, resulting in graphene-like sheets through elimination oxygen-including functional groups. In this paper, effect localized interactions an Ag/GO/Au multilayer system was studied explore potential for photonic applications. GO dip-coated onto magnetron-sputtered silver, followed by deposition thin gold film form structure. Micro-Raman Spectroscopy, SEM and Variable Angle Ellipsometry (VASE) measurements were performed on An interesting behavior deposited silver with formation Ag nanostructures top layer reported. addition typical bands, analysis reveals peaks such 1478 cm−1 band, indicating transition from sp3 sp2 hybridization, confirming partial reduction GO. Additionally, calculations based effective medium theory (EMT) highlight Ag/GO structures hyperbolic metamaterials photonics. The exhibits dielectric up 323 nm, transitions type I HMM between 400 nm undergoes Epsilon Near Zero Pole (ENZP) at II behavior.

Язык: Английский

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Design of a Tunable Metamaterial Absorption Device with an Absorption Band Covering the Mid-Infrared Atmospheric Window

Photonics, Год журнала: 2025, Номер 12(2), С. 148 - 148

Опубликована: Фев. 12, 2025

We propose a highly efficient broadband tunable metamaterial infrared absorption device. The design is modeled using the three-dimensional finite element method for results show that device captures over 90% of light in wavelength range from 6.10 μm to 17.42 μm. utilize VO2’s phase change property adjust device, allowing average level vary between 20.61% and 94.88%. In this study, we analyze electromagnetic field distribution at its peak point find high achieved through both surface plasmon resonance Fabry–Perot cavity resonance. structural parameters are fine-tuned parameter scanning. By comparing our work with previous studies, demonstrate superior performance design. Additionally, investigate polarization angle incident it insensitive these factors. Importantly, simple structure broadens potential uses photodetection, stealth, sensing.

Язык: Английский

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Auxetic crack-based wearable strain sensor designed for sustainable conformal contact

Sensors and Actuators A Physical, Год журнала: 2025, Номер unknown, С. 116429 - 116429

Опубликована: Март 1, 2025

Язык: Английский

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