Multifunctional coding metasurface for focusing and beam deflection based on polarization selection DOI
Song Tian,

Mingxiu Han,

Juan Xu

et al.

Electromagnetics, Journal Year: 2024, Volume and Issue: 44(1), P. 57 - 71

Published: Jan. 2, 2024

In this paper, a full-space multifunctional coding metasurface (MS) with reflection and transmission integration is proposed to realize the independent manipulation of electromagnetic waves at two different frequencies. The unit consists layers dielectric substrate three metal patch, upper reflective layer composed ring split (URSR), middle groove (MSR), lower (LSR). mode works 13.4 GHz, incoming linear polarization (LP) beam deflection angle 34°. While 17.9 focusing achieved under action circular (CP) waves. order verify feasibility design, circularly polarized antenna placed 80 mm in -Z direction, gain increases from 7.5 dB 22.5 dB. Meanwhile microstrip antennas fabricated measured, results are consistent simulation results. method provides possibility high-rate information devices communication systems.

Language: Английский

The tunable absorber films of grating structure of AlCuFe quasicrystal with high Q and refractive index sensitivity DOI
Wenxin Li, Yahui Liu, Le Ling

et al.

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 48, P. 104248 - 104248

Published: March 26, 2024

Language: Английский

Citations

114
Tunable VO2 metasurface for reflective terahertz linear and circular polarization wavefront manipulation at two frequencies independently DOI

HE Yi-qing,

Bin Cai, Ling Wu

et al.

Physica B Condensed Matter, Journal Year: 2024, Volume and Issue: 681, P. 415848 - 415848

Published: March 15, 2024

Language: Английский

Citations

41
Microstrip antenna loaded with focusing metasurface for high-gain dual-polarization and bidirectional radiation DOI Creative Commons
Yibo Sun, Lingling Yang, Jinxiu Wang

et al.

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

Citations

7
Efficiency tunable broadband terahertz graphene metasurface for circular polarization anomalous reflection and plane focusing effect DOI

Dongru Yang,

Yongzhi Cheng, Fu Chen

et al.

Diamond and Related Materials, Journal Year: 2022, Volume and Issue: 131, P. 109605 - 109605

Published: Dec. 10, 2022

Language: Английский

Citations

56
Spectrally Selective Ultra‐Broadband Solar Absorber Based on Pyramidal Structure DOI Creative Commons

Fuyan Wu,

Yahui Liu,

Le Ling

et al.

Advanced Photonics Research, Journal Year: 2023, Volume and Issue: 5(3)

Published: Dec. 26, 2023

Here, a spectrally selective solar absorber is explored and an ultra‐broadband proposed based on pyramidal structure. The finite‐difference in time domain (FDTD) software used to model the spectral characteristics magnetic absorption patterns of this absorber. emissivity less than 20% far‐infrared band over 6000 nm, showing good selectivity, total thermal conversion efficiency very close that ideal truncated by analyzing performance our absorber‐related indexes. By studying high absorber, selectivity can be better investigated depth. 200–4000 nm chosed as depth study band. possesses ultra‐wide bandwidth 3554 average 97.4%, 200–3754 band, has ultra‐high rate more 98.3%, its emitter emission 94% at temperature 1000 K. Notably, weighted 280–4000 AM1.5 98.86%, with loss only 1.14%. property mainly joint effect surface plasmon resonance coupling.

Language: Английский

Citations

35
Dual-band terahertz reflective-mode metasurface for the wavefront manipulation of independent linear and circular polarization waves DOI
Yongzhi Cheng,

Chenguang Rong,

Jun Li

et al.

Journal of the Optical Society of America B, Journal Year: 2023, Volume and Issue: 41(2), P. 341 - 341

Published: Dec. 15, 2023

Metasurfaces (MSs) are being extensively researched owing to their ability modulate the polarization and wavefront of electromagnetic (EM) waves in a flexible manner, which usually offer significant advantages including ultra-thinness, low losses, easy fabrication. However, conventional MSs typically operate well only with single polarization. Here, we propose novel design strategy for terahertz (THz) reflective-mode MS that relies on unit-cell arrangement combining propagation phase geometric phase. Our designed can achieve multiple manipulations reflection mode, not limited circular (CP) transformation, but also enabling linear (LP) conversion. The consists periodic array bilayered metal patterned resonator structures sandwiched by dielectric substrate. metallic is made outer single-split-ring (SSR) C-shaped slot (CSS), inner double-split-ring (DSR), its complementary structure. With this design, capable converting LP wave orthogonal counterpart at lower frequency ( f 1 =0.7THz) after reflection. Additionally, higher 2 =1.4THz), proposed convert right-handed CP (RCP) left-handed (LCP) upon or vice versa. π full coverage be achieved independently simultaneously adjusting opening orientation angles SSR based phase, angle DSR We numerically demonstrate beam deflection, planar focusing, vortex both reflected three representative provide proof concept. These findings reveal great potential multifunctional devices dual-polarization imaging communication systems.

Language: Английский

Citations

29
Ultrathin and Ultra‐Broadband Terahertz Single‐Layer Metasurface Based on Double‐Arrow‐Shaped Resonator Structure for Full‐Space Wavefront Manipulation DOI

Dongru Yang,

Yongzhi Cheng, Hui Luo

et al.

Advanced Theory and Simulations, Journal Year: 2023, Volume and Issue: 6(6)

Published: April 25, 2023

Abstract In this paper, a simple design of an ultrathin and ultra‐broadband single‐layer MS based on double‐arrow‐shaped resonator (DASR) structure for both transmission reflection modes in terahertz (THz) region is presented. The composed periodic array the combination metal DASR complementary circular patch (CCP) adhered dielectric substrate. Numerical results show that can convert CP wave to its orthogonal component after simultaneously, corresponding amplitudes are ≈0.45 average from 0.45 1.75 THz with relative bandwidth 118.2%, which conversion efficiency closing theoretical limit (25%) structure. Furthermore, 0–2π phase shifts reflected transmitted be achieved simultaneously by adjusting oriented angle (α) along propagation direction. For concept proofs, beams deflection, vortex beam generation, focusing effect demonstrated numerically. provide new possibilities potential develop multifunctional full‐space devices.

Language: Английский

Citations

25
Tri-band terahertz vortex beam generator based on a completely independent geometric phase metasurface DOI
Jiaqi Liu, Yongzhi Cheng, Fu Chen

et al.

Journal of the Optical Society of America B, Journal Year: 2023, Volume and Issue: 40(2), P. 441 - 441

Published: Jan. 5, 2023

A vortex beam carrying orbital angular momentum (OAM) is an effective way to increase wireless communication capacity. The existing terahertz (THz) metasurface (MS)-based generator limited operating at a single or two frequency points, and also has wavelength-dependent behavior, thus limiting its application. Here, transmissive MS proposed generate THz beams OAM with different topological charges l = − 1 , 2 3 ( + ) under left/right-handed circular polarization (CP) incidence three frequencies. mode purity of the generated all orders greater than 60% CP wave 0.6 THz, 0.857 1.892 respectively. Both theoretical prediction simulation results verify that designed can independently manipulate waves unit-cell structure preferable for increasing number operation frequencies while guaranteeing manipulation electromagnetic waves. compact system provides ideas fabrication multifunctional MS-based devices higher integration smaller size.

Language: Английский

Citations

21
Four-channel meta-hologram enabled by a frequency-multiplexed mono-layered geometric phase metasurface DOI Creative Commons
Lei Zhu,

Jinxu Wei,

Liang Dong

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 32(3), P. 4553 - 4553

Published: Jan. 15, 2024

In recent years, frequency-multiplexed metasurfaces have received extensive attention due to the increasing demand for multifunction integration and communication capacity. However, multi-channel studies achieved with a mono-layered metasurface are limited. Herein, universal design strategy geometric phase is proposed by utilizing Pancharatnam-Berry (PB) modulations. The elementary meta-atom judiciously designed transmit cross-polarized component of circularly polarized incident wave at four distinct frequencies independent 360° shifts constant amplitude 0.48, close theoretical limit 0.5. As proof-of-concept demonstration, four-channel meta-hologram achieve holographic images “three foci”, “five “J” “X” 7.2 GHz, 9.1 10.9 15.2 GHz respectively. projected in desired azimuth planes exploiting time-shifting properties Fourier transform. experimental full-wave simulation results good agreement, which indicates that has great potentials various applications, such as imaging information encryption technology.

Language: Английский

Citations

7
Terahertz Transmission‐Type Metasurface for the Linear and Circular Polarization Wavefront Manipulation DOI
Jun Li, Yongzhi Cheng, Xiangcheng Li

et al.

Advanced Theory and Simulations, Journal Year: 2022, Volume and Issue: 5(8)

Published: June 1, 2022

Abstract A transmission‐type metasurface (MS) based on the combined geometric and transmission phase is proposed investigated here numerically, which can achieve independently manipulation of circular polarization (CP) linear (LP) wavefront at terahertz (THz) region. The unit‐cell MS composed dielectric substrate sandwiched with bilayered inner centrosymmetric‐notched‐elliptic (CNE), outer C‐shaped, single‐split‐ring (SSR) structures. convert normal incident LP wave to its orthogonal one lower frequency ( f 1 = 0.68 THz) after left‐handed transmitted right‐handed or vice versa higher 2 1.34 THz). full 2π shifts both CP waves be realized simultaneously by varying opening orientation angles SSR structure angle CNE phase, respectively. As proofs concept, anomalous refraction, planar focusing, vortex beam generation for are demonstrated numerically. These findings show great potential applications in imaging communication systems, providing new possibilities develop multifunctional THz device waves.

Language: Английский

Citations

20