Chinese Journal of Lasers, Journal Year: 2024, Volume and Issue: 51(17), P. 1700003 - 1700003
Published: Jan. 1, 2024
Progress in Quantum Electronics, Journal Year: 2025, Volume and Issue: unknown, P. 100554 - 100554
Published: Feb. 1, 2025
Language: Английский
Citations
0
Optics Letters, Journal Year: 2025, Volume and Issue: 50(5), P. 1637 - 1637
Published: Feb. 10, 2025
Freeform metasurfaces based on topology optimization enable precise control over electromagnetic functionalities, with widespread applications in metagratings, metalenses, and polarization transformations. The selection of the initial structure plays a crucial role determining quality final results. In this study, global solution-based (GISTO) is proposed to design beam merging metagrating efficiently. A two-dimensional encoded non-dominated sorting genetic algorithm II employed for exploration obtain high-quality structure, which then refined using gradient-based local design. By integrating optimization, efficiency significantly improved. Under symmetric incidence, efficiencies x-polarized y-polarized beams reach 93.6% 95.3%, respectively, while under asymmetric achieve 99.4% 95.4%, respectively.
Language: Английский
Citations
0
JETP Letters, Journal Year: 2025, Volume and Issue: unknown
Published: March 24, 2025
A transmission-type all-dielectric coded supergrating operating in the terahertz band is designed. The structure uses Si as dielectric material to realize change of transmission phase 2π 0.06 ~ 0.15 THz. Compared with conventional gratings, supergratings have advantages wide bandwidth, high transmittance, easy coupling fiber, and low cost. It represents a new direction optical coding technology has application prospect research value. We design 1-bit supergrating. By changing width grating element structure, two basic structures coefficients continuous changes 180° are obtained. Based on addition theorem digital coding, far-field scattering angle controlled by encoding unit grating, its arrangement order physical superposition. generalized Snell principle, designed calculated theoretically, characteristics simulation results analyzed.
Language: Английский
Citations
0
ACS Photonics, Journal Year: 2025, Volume and Issue: unknown
Published: April 14, 2025
Language: Английский
Citations
0
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: April 29, 2025
Abstract Metasurface is a revolutionary platform to achieve desired properties by artificially engineering meta‐atom's arrangements. However, the explosively expanding design space of advanced metasurfaces with multiple degrees freedom (MDOF) has made traditional human‐guided methods increasingly ineffective, limiting development metasurfaces. Intelligent have been presented tackle these challenges introducing innovative computational models, but they are predominantly data‐driven and faced issues data scarcity, poor physical interpretability, weak generalization capability. Here, physics‐driven intelligent (PDID) paradigm proposed demonstrates its application MDOF multiplexed The PDID method integrates prior knowledge into deep neural network, thereby enhancing interpretability reducing reliance on extensive databases. Compared designs, this can reduce both time database size two orders magnitude. Through experimental validation metasurfaces, versatility efficiency showed. This not only presents novel tool also exemplifies integration machine learning address challenges. Its interdisciplinary insights offer significant potentials for applications across materials science, information technology.
Language: Английский
Citations
0
Applied Physics B, Journal Year: 2025, Volume and Issue: 131(6)
Published: May 10, 2025
Language: Английский
Citations
0
Photonics and Nanostructures - Fundamentals and Applications, Journal Year: 2025, Volume and Issue: unknown, P. 101396 - 101396
Published: May 1, 2025
Language: Английский
Citations
0
Advanced Electronic Materials, Journal Year: 2024, Volume and Issue: 10(8)
Published: Feb. 22, 2024
Abstract Reconfigurable metasurfaces have exhibited significant potential in wireless communication owing to their capacity transmit information without relying on traditional complex radio frequency (RF) chain transmitters. Nonetheless, the majority of metasurface‐based systems modulate signals only time domain. Here, an amplitude‐phase reconfigurable metasurface is proposed establish a system that can simultaneously different messages users by encoding digital within spatial By changing bias voltages varactors integrated meta‐atom, achieve independent 3‐bit phase and 1‐bit amplitude coding. Through beamforming methodology, generates diverse scattering beams with suppressed sidelobe levels, which not enables multiple channels through space coding but also reduces signal leakage undesired directions. Numerical simulations experiments are carried out verify scheme, dual‐channel established. The results show two distinct images be retrieved separate users, demonstrates transmission capability system. strategy opens up avenue for implementing multi‐channel systems, indicates its great multiple‐user collaborative radar systems.
Language: Английский
Citations
3
Opto-Electronic Advances, Journal Year: 2024, Volume and Issue: 7(9), P. 240040 - 240040
Published: Jan. 1, 2024
Smart antennas have received great attention for their potentials to enable communication and perception functions at the same time. However, realizing function synthesis remains an open challenge, most existing system solutions are limited narrow operating bands high complexity cost. Here, we propose externally perceivable leaky-wave antenna (LWA) based on spoof surface plasmon polaritons (SSPPs), which can realize adaptive real-time switching between "radiating" "non-radiating" states beam tracking different frequencies. With assistance of computer vision, smart SSPP-LWA is able detect external target user or jammer, intelligently track by self-adjusting frequency. The proposed scheme helps reduce power consumption through dynamically controlling radiating state antenna, improve spectrum utilization avoid conflicts deciding On other hand, it also helpful physical layer security working according presence in real In addition, be generalized metamaterial systems could a candidate synaesthesia integration future systems.
Language: Английский
Citations
3
Optics Letters, Journal Year: 2023, Volume and Issue: 48(19), P. 5085 - 5085
Published: Aug. 24, 2023
In this Letter, we propose a multifunctional imaging system enabled by single geometric-phase-based liquid crystal (LC) element, which integrates chiral polarization and edge enhancement imaging. The element is located at the frequency domain plane in 4F system, phase profile of consists fork grating x direction y direction, provide capabilities. Benefiting from tunable property LC, can be switched mode to normal conventional capable conveniently acquiring needed image information. Experiments demonstrate that easily achieve switchable imaging, agrees well with our design, LC work broadband spectrum because geometric modulation. strategy used here effectively avoid need increase size original microscopic for additional mechanical rotation components. We believe proposed advantages electric control tunability find applications biological medical detection, optical computing.
Language: Английский
Citations
4