Optical Materials, Год журнала: 2024, Номер 150, С. 115177 - 115177
Опубликована: Март 6, 2024
Язык: Английский
Optical Materials, Год журнала: 2024, Номер 150, С. 115177 - 115177
Опубликована: Март 6, 2024
Язык: Английский
Surfaces and Interfaces, Год журнала: 2024, Номер 48, С. 104248 - 104248
Опубликована: Март 26, 2024
Язык: Английский
Процитировано
114Physica B Condensed Matter, Год журнала: 2024, Номер 681, С. 415848 - 415848
Опубликована: Март 15, 2024
Язык: Английский
Процитировано
41Journal of Applied Physics, Год журнала: 2025, Номер 137(1)
Опубликована: Янв. 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.
Язык: Английский
Процитировано
7Diamond and Related Materials, Год журнала: 2022, Номер 131, С. 109605 - 109605
Опубликована: Дек. 10, 2022
Язык: Английский
Процитировано
56Advanced Photonics Research, Год журнала: 2023, Номер 5(3)
Опубликована: Дек. 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.
Язык: Английский
Процитировано
36Journal of the Optical Society of America B, Год журнала: 2023, Номер 41(2), С. 341 - 341
Опубликована: Дек. 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.
Язык: Английский
Процитировано
29Advanced Theory and Simulations, Год журнала: 2023, Номер 6(6)
Опубликована: Апрель 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.
Язык: Английский
Процитировано
25Journal of the Optical Society of America B, Год журнала: 2023, Номер 40(2), С. 441 - 441
Опубликована: Янв. 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
Язык: Английский
Процитировано
21Optics Express, Год журнала: 2024, Номер 32(3), С. 4553 - 4553
Опубликована: Янв. 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.
Язык: Английский
Процитировано
7Advanced Theory and Simulations, Год журнала: 2022, Номер 5(8)
Опубликована: Июнь 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.
Язык: Английский
Процитировано
21