Laser & Optoelectronics Progress, Год журнала: 2024, Номер 61(19), С. 1913015 - 1913015
Опубликована: Янв. 1, 2024
Optics Communications, Год журнала: 2025, Номер unknown, С. 131481 - 131481
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Applied Physics Letters, Год журнала: 2025, Номер 126(7)
Опубликована: Фев. 17, 2025
Terahertz technology is poised to revolutionize next-generation wireless communication systems, such as 5G-A and 6G, by addressing the growing need for efficient electromagnetic wave modulation in terahertz frequency band. In this study, we present a reflective metasurface comprising dual metal layers tunable liquid crystal medium, designed achieve dynamic linear-to-circular polarization conversion. Experimental results demonstrate conversion across three bands: 248–254, 265–278, 287–292 GHz. Furthermore, left-hand circular (LHCP)-to-right-hand (RHCP) switching achieved at 248–254 GHz, with stable RHCP state observed 265–278 These findings validate device's ability dynamically control states through applied bias voltage. By enabling precise flexible modulation, provides scalable solution reconfigurable intelligent surfaces, paving way advanced systems future networks.
Язык: Английский
Процитировано
0
Opto-Electronic Advances, Год журнала: 2025, Номер 0(0), С. 240250 - 240250
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Март 8, 2025
Abstract Vortex beams with orbital angular momentum (OAM) exhibit immense potential in various fields such as communications, information processing, and optical tweezers. Nevertheless, current terahertz vortex beam generators still face challenges including narrow frequency bands, low efficiency, limited multiplexing capabilities, difficulties dynamic tuning. Here, the study introduces a new electrically controlled multi‐channel strategy that harnesses cascaded helical geometric metasurface, liquid crystal (LC) layer, OAM‐based metalens to achieve comprehensive independent phase manipulation across all four spin channels. Moreover, by employing spin, spatial, OAM multiplexing, LC active control technology, eight distinguishable (SAM)‐OAM coupling states are decoded, enabling of 6 different topological charges. Experimental validation reveals remarkable performance: within broadband range 0.4–0.6 THz, peak excitation efficiency up 94%, each mode purity reaching its highest level >80%, minimum value inter‐mode crosstalk is <–11 dB. This generation conversion mechanism enhances operational flexibility light field manipulation, breaking through limitations channel band, pioneering novel avenue for bolstering parallel mitigating inter‐channel crosstalk.
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Март 31, 2025
Abstract Vectorial holography expands the information dimensionalities of image, manifesting significant value in applications such as optical encryption, and polarization multiplexing. To address challenges like erasable storage, secret key leakage, echo noise, a dynamic terahertz vectorial is demonstrated based on magnetic heterogeneous integrated metasurfaces with nonvolatility nonreciprocity, whose states vary continuously along latitude whole Poincare Sphere experimental ellipticity angles image covering −0.23π–0.21π rad, can be stored or erased through nonvolatile rotation. This allows for encryption random that regenerated indefinitely, greatly eliminating risk leakage. The crosstalk between orthogonal less than 0.0056. Meanwhile, leveraging magneto‐optical metasurface functions Janus hologram one‐way isolation forward backward illumination, which area proportion over 5 dB reaches 89%, effectively noise further improving anti‐interference. work addresses gaps holography, realizes nonreciprocal processing, mitigates risks leakage interference.
Язык: Английский
Процитировано
0
Research, Год журнала: 2024, Номер 8
Опубликована: Дек. 17, 2024
Recent advancements in nanotechnology have revolutionized terahertz (THz) technology. By enabling the creation of compact, efficient devices through nanoscale structures, such as nano-thick heterostructures, metasurfaces, and hybrid systems, these innovations offer unprecedented control over THz wave generation modulation. This has led to substantial enhancements spectroscopy, imaging, especially bio-applications, providing higher resolution sensitivity. review comprehensively examines latest nanoengineered technology, beginning with state-of-the-art methods based on followed by modulation techniques, including both homogeneous individual Subsequently, it explores bio-applications novel biosensing biofunction techniques. Finally, summarizes findings reflects future trends challenges field. Each section focuses physical mechanisms, structural designs, performances, aiming provide a thorough understanding potential this rapidly evolving technology domain. aims insights into next-generation applications while establishing comprehensive foundation for addressing key issues that limit full implementation promising technologies real-world scenarios.
Язык: Английский
Процитировано
1
Laser & Optoelectronics Progress, Год журнала: 2024, Номер 61(19), С. 1913015 - 1913015
Опубликована: Янв. 1, 2024
Процитировано
0