Polarization independent tunable near-perfect absorber based on graphene-BaO arrays and Ag-dielectric Bragg reflector composite structure

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: 152, P. 111958 - 111958

Published: Jan. 7, 2025

Language: Английский

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Microstrip antenna loaded with focusing metasurface for high-gain dual-polarization and bidirectional radiation

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(1)

Published: Jan. 3, 2025

In this paper, we propose a microstrip antenna that incorporates dual-polarization and bidirectional focusing metasurface (MS) for achieving high-gain transmission in circular polarization (CP) reflection linear (LP) radiation, respectively. Initially, design MS enables independent manipulation of the transmitted CP wave at lower frequency 8.2 GHz reflected LP higher 16.2 GHz, The unit-cell comprises combination an outer bilayered split-ring resonator, along with inner arc-shaped disk resonators, all separated by dielectric substrate. Subsequently, coaxial-fed laminated is designed capable realizing radiation gain approximately 4.9 dBic 4.8 dBi, To improve performance, construct integrated MS. This configuration to achieve peak 13.1 14.6 dBi relative bandwidth 6.79% (at GHz) 13.54% reflective wave, evaluate practicality our proposed design, fabricated measured antenna, both without results obtained from these measurements closely align simulations, thereby validating effectiveness antenna. provides practical solution facilitating high-speed information communication systems.

Language: Английский

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Tunable terahertz filter using graphene for refractive index sensing

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 111982 - 111982

Published: Jan. 1, 2025

Language: Английский

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Composite control of wavelength and polarization of a metalens based on double-layer geometric phase

Physics Letters A, Journal Year: 2025, Volume and Issue: unknown, P. 130283 - 130283

Published: Jan. 1, 2025

Language: Английский

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Dynamic Modulation of Terahertz Beams Based on Photosensitive Silicon-Gold Composite Metasurfaces

Journal of Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Language: Английский

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Dual-band Flexible Plasmonic Metasensors for Ultrasensitive Terahertz Biomedical Sensing

Sensors and Actuators B Chemical, Journal Year: 2025, Volume and Issue: unknown, P. 137480 - 137480

Published: Feb. 1, 2025

Language: Английский

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Using a Binary Coding Metasurface to Achieve Polarization‐Dependent Full‐Duplex and Full‐Polarization Receiving

Engineering Reports, Journal Year: 2025, Volume and Issue: 7(3)

Published: March 1, 2025

ABSTRACT Coding metasurfaces have the advantage of controlling electromagnetic waves by designing digital states unit elements. This mechanism can be conveniently integrated into electronic information systems, hence, coding been studied extensively in fields radar and communication. However, full‐duplex full‐polarization, as two critical issues system‐level applications, rarely addressed existing researches metasurfaces. Here we propose a flexible method to design binary metasurface that possesses functions polarization‐dependent full‐polarization receiving. Specifically, designed is shared different feeding sources, sources independently transmit or receive orthogonally polarized through metasurface, hence forming full‐duplex; on other hand, orthogonal components incoming received respectively Both simulations measurements validated thus showing potential presented sensing, wireless communication, systems.

Language: Английский

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

Frequenz, Journal Year: 2025, Volume and Issue: unknown

Published: March 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.

Language: Английский

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Tunable dual-band metasurface absorber utilizing electric dipole and magnetic loop in a DC-connected bilayer graphene stack: A theoretical approach

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 112208 - 112208

Published: March 1, 2025

Language: Английский

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Broadband metasurface-based reflective polarization converter

Frequenz, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract This paper investigates a metasurface-based broadband polarization converter (BPC). Notably, to achieve working frequency region (4.22–10.73 GHz), single substrate layer is used instead of several layers. The design device converts an incidence wave that linearly polarized (LP) into reflected cross-polarized (CrP) over the range 4.22–10.73 GHz up oblique incident angle 20°. In addition, fabricated, and there strong agreement between modeling measurement results.

Language: Английский

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