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On-chip topological beamformer for multi-link terahertz 6G to XG wireless.
Nature
August 2024
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
Terahertz (THz) wireless communication holds immense potential to revolutionize future 6G to XG networks with high capacity, low latency and extensive connectivity. Efficient THz beamformers are essential for energy-efficient connections, compensating path loss, optimizing resource usage and enhancing spectral efficiency. However, current beamformers face several challenges, including notable loss, limited bandwidth, constrained spatial coverage and poor integration with on-chip THz circuits.
View Article and Find Full Text PDFAll-Silicon Polarization-Insensitive Metamaterial Absorber in the Terahertz Range.
Materials (Basel)
April 2024
Key Laboratory of Opto-Electronics Information Science and Technology, Ministry of Education, Institute of Laser and Opto-Electronics, Tianjin University, Tianjin 300072, China.
All-silicon terahertz absorbers have attracted considerable interest. We present a design and numerical study of an all-silicon polarization-insensitive terahertz metamaterial absorber. The meta-atoms of the metamaterial absorber are square silicon rings which can be viewed as gratings.
View Article and Find Full Text PDFWe demonstrated all-silicon IQ modulators (IQMs) operating at 120-GBaud 16-QAM with suitable bandwidth, and output power. We required optical signal-to-noise-ratio (rOSNR) that have promising potential to be used in 800-Gbps small-form-factor pluggable transceivers for data center interconnection. First, we tested an IQM chip using discrete drivers and achieved a per-polarization TX output power of -18.
View Article and Find Full Text PDFTip-Induced Nanopatterning of Ultrathin Polymer Brushes.
Small
July 2023
Institute of Applied Physics (APH), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131, Karlsruhe, Germany.
Patterned, ultra-thin surface layers can serve as templates for positioning nanoparticlesor targeted self-assembly of molecular structures, for example, block-copolymers. This work investigates the high-resolution, atomic force microscopebased patterning of 2 nm thick vinyl-terminated polystyrene brush layers and evaluates the line broadening due to tip degradation. This work compares the patterning properties with those of a silane-based fluorinated self-assembled monolayer (SAM), using molecular heteropatterns generated by modified polymer blend lithography (brush/SAM-PBL).
View Article and Find Full Text PDFFocusing on the Development and Current Status of Metamaterial Absorber by Bibliometric Analysis.
Materials (Basel)
March 2023
Institute of Laser and Opt-Electronics, Key Laboratory of Opt-Electronics Information Science and Technology, Ministry of Education, Tianjin University, Tianjin 300072, China.
In this paper, a total of 4770 effective documents about metamaterial absorbers were retrieved from the Web of Science Core Collection database. We scientifically analyzed the co-occurrence network of co-citation analysis by author, country/region, institutional, document, keywords co-occurrence, and the timeline of the clusters in the field of metamaterial absorber. Landy N.
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