High‐Resolution Phase‐Magnitude‐Decoupled Information Metasurface for Complex Beamforming and Dual Channel 16QAM Secure Communication DOI
Zheng Xing Wang, Hui Xu,

Jie Ming Lv

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Abstract Information metasurfaces have attracted considerable attention due to their remarkable ability tailor electromagnetic (EM) waves flexibly. However, it is still challenging achieve high‐resolution phase‐magnitude‐decoupled modulations with high integration and more degrees of freedom in 2D. In this work, a low‐profile information metasurface (PMDIM) proposed that enables independent controls both phase magnitude. By precisely applying different bias voltages two groups PIN diodes the PMDIM unit cell, 2‐bit responses continuous magnitude control ranging from 0.2 1 across wide bandwidth are achieved unit‐by‐unit manner, offering 2D capability for EM manipulations. For validation, combined carefully optimized phase‐magnitude coding sequences realize functions: complex beamforming dual‐channel 16QAM secure communication. The first function includes single‐beam steering low sidelobes, dual‐beam power allocation, multi‐beam steering; while second enhances capacity physical layer security wireless systems. Measured results demonstrate excellent performance PMDIM, showing significant potentials modern radar communications.

Language: Английский

Multi‐Channel Secret Sharing and Camouflage in Programmable Metasurface‐Based Wireless Communication DOI
Jie Tian, Zhenfei Li, Chong He

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Abstract Information security has become increasingly critical with the widespread development of wireless technologies. However, current information technologies predominantly rely on either software‐layer or physical‐layer encryption as standalone solutions, both which present fundamental constraints. In this article, a novel architecture for multi‐channel secret sharing and camouflage is proposed by combining software‐ mechanism based programmable metasurface. At software layer, one‐time pad (OTP) algorithm employs exclusive‐OR (XOR) operations dynamic keys predefined data to encrypt share secrets. physical metasurface spatially disperses shared messages through reconfigurable multi‐beam steering polarization control. Over‐the‐air experiments demonstrate that successfully realizes OTP sharing, capability unattainable static metasurface‐based systems. The robustness system also verified, underscoring its potential real‐world applications. Crucially, legitimate users must collaboratively combine all distributed encrypted recovery, whereas eavesdroppers intercepting individual channels obtain only non‐decryptable fragments, correspond data. This work synergistically integrates functionalities metasurfaces, offering transformative future highly secure networks storage architectures.

Language: Английский

Citations

0
Nonlinear Information Metasurface for Second-Harmonic Generation, Manipulation, and Backscatter Communication DOI

Tianyao Li,

Zhangjie Luo, J.W.M. Tai

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(19), P. 28752 - 28763

Published: May 5, 2025

In the microwave spectrum, emergence of metamaterials has paved a pathway for direct conversion spatial waves into frequency-multiplication harmonics. However, despite attractive physical discoveries, practical application these harmonics not been well explored. Here, we propose nonlinear information metasurface (IMS) harmonic generation and demonstrate its in backscatter communication (BackCom). The IMS consists an array passive meta-atoms controlled by digital module, which can multiply frequency incident wave dynamically tailor phase generated second (SH). A prototype is fabricated, relatively high frequency-conversion efficiency real-time controllable SH scattering performances are validated experimentally. BackCom system, key roles beam-steering modulation demonstrated, showcasing binary quadrature shift keying schemes directly on carrier wave. Given that backscattered signals operate separate channels, presents promising solution with enhanced reduced interference, particularly context increasingly congested spectrum today.

Language: Английский

Citations

0
High‐Resolution Phase‐Magnitude‐Decoupled Information Metasurface for Complex Beamforming and Dual Channel 16QAM Secure Communication DOI
Zheng Xing Wang, Hui Xu,

Jie Ming Lv

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Abstract Information metasurfaces have attracted considerable attention due to their remarkable ability tailor electromagnetic (EM) waves flexibly. However, it is still challenging achieve high‐resolution phase‐magnitude‐decoupled modulations with high integration and more degrees of freedom in 2D. In this work, a low‐profile information metasurface (PMDIM) proposed that enables independent controls both phase magnitude. By precisely applying different bias voltages two groups PIN diodes the PMDIM unit cell, 2‐bit responses continuous magnitude control ranging from 0.2 1 across wide bandwidth are achieved unit‐by‐unit manner, offering 2D capability for EM manipulations. For validation, combined carefully optimized phase‐magnitude coding sequences realize functions: complex beamforming dual‐channel 16QAM secure communication. The first function includes single‐beam steering low sidelobes, dual‐beam power allocation, multi‐beam steering; while second enhances capacity physical layer security wireless systems. Measured results demonstrate excellent performance PMDIM, showing significant potentials modern radar communications.

Language: Английский

Citations

0