Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Due to the growing scarcity of spectrum resources in the low-frequency band, the requirement of beam-reconfigurable antennas in the millimeter wave band is urgent. In this paper, a W-band graphene-based metasurface working in a broad bandwidth is proposed with reflective amplitude coding. Here, graphene sheets play a dual role in radiating and regulating electromagnetic waves. By adjusting the Fermi levels of graphene, the reflective amplitude and phase of the metasurface can be modulated simultaneously, enabling multi-beam switching and beam deflection in far-field. The proposed metasurface achieves amplitude-phase modulation within a significantly wide bandwidth which covers 75-91.5 GHz and 99.3-115 GHz. By optimizing the coding patterns, the proposed graphene-based metasurfaces are able to not only realize 2-D beam steering, but also achieve beam switching from single beam to four beams at 87 GHz. The proposed design provides a novel solution for the flexible manipulation of millimeter waves, which can be applied to various fields such as vehicle radar, satellite communication, 6G wireless communication, and beyond.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342350 | PMC |
| http://dx.doi.org/10.3390/ma16134633 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Polarization spatial diversity and multiplexing MIMO surface enabled by graphene for terahertz communications.
Nanophotonics
August 2025
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
The terahertz (THz) frequency band has abundant spectrum resources, which is suitable for constructing communication systems with ultra-high data rates and extremely low latency. Multiple input multiple output (MIMO) devices are crucial for realizing THz communication, and the synchronous transmission and noncorrelation of different channels are the keys to MIMO technology. This paper proposes a graphene-based polarization spatial diversity and multiplexing MIMO surface (PDM-MIMOS) with 2 × 2 metasurface arrays.
View Article and Find Full Text PDFMonolayer graphene-based perfect absorber plays a critical role in advanced sensing, photodetection, and optical communications. Significant effort has been devoted to realizing an ideal absorber at a single wavelength by integrating graphene onto a high-quality resonant metasurface. Here, we present what we believe to be a novel strategy for achieving independent, multi-band perfect absorption in graphene by harnessing Brillouin zone-folding induced quasi-bound states in the continuum (quasi-BICs).
View Article and Find Full Text PDFIn recent years, biosensors based on terahertz metamaterials have emerged as a prominent area of research. However, studies focusing on enhancing biosensing performance through optical pumping to improve sensitivity are scarce. This paper proposes a graphene-based electromagnetically induced transparency-like (EIT-like) optics-enhanced terahertz metamaterials biosensor.
View Article and Find Full Text PDFGraphene-based metasurface: dynamic optical control in ultrathin flat optics.
Nanophotonics
June 2025
Department of Physics, University of Ulsan, Ulsan 44610, Republic of Korea.
Graphene hosts massless Dirac fermions owing to its linear electronic band structure. This distinctive feature underpins its extraordinary electronic properties, correlating to strong light-matter interactions on an extreme subwavelength scale. Over the past decade, intensive investigations have transitioned from fundamental graphene's optical properties to practical application with the integration of graphene into metasurfaces, opening a new era of active flat optics.
View Article and Find Full Text PDFPolarization-independent dual-band quasi-bound states in the continuum based on graphene metasurface for tunable THz sensing application.
Sci Rep
April 2025
School of Physics & Electronic Information, Jiangsu Second Normal University, Nanjing, 210013, China.
To catch high quality (Q) factors is always pursued for optical resonators. In this study, polarization-independent dual-band quasi-bound states in the continuum (quasi-BIC) in a graphene-based metasurface is proposed for the first time in the terahertz regime. The quasi-BIC resonance modes with a Q factor of 176 is achieved by introducing symmetry breaking into the unit structure.
View Article and Find Full Text PDF