Results 41 to 50 of about 148,956 (197)

Graphene plasmons-enhanced terahertz response assisted by metallic gratings

open access: yesNanophotonics, 2022
Terahertz detectors based on two-dimensional Dirac materials offer a new approach for room-temperature terahertz detection with high response and low noise.
Yu Anqi   +9 more
doaj   +1 more source

Generalized Persistent Polar Format Algorithm for Fast Imaging of Airborne Video SAR

open access: yesRemote Sensing, 2023
As a cutting-edge research direction in the field of radar imaging, video SAR has the capability of high-resolution and persistent imaging at any time and under any weather.
Jiawei Jiang   +3 more
doaj   +1 more source

Combating the Distance Problem in the Millimeter Wave and Terahertz Frequency Bands [PDF]

open access: yesIEEE Communications Magazine, 2018
In the millimeter-wave (30-300 GHz) and terahertz (0.1-10 THz) frequency bands, the high spreading loss and molecular absorption often limit the signal transmission distance and coverage range.
I. Akyildiz, Chong Han, Shuai Nie
semanticscholar   +1 more source

Light-guiding-light-based temporal integration of broadband terahertz pulses in air

open access: yesAPL Photonics, 2023
The next generation of all-optical computation platforms prefers the light-guiding-light (LGL) scheme inside a medium that envisions circuitry-free and rapidly reconfigurable systems powered by dynamic interactions between light beams.
Jiayu Zhao   +7 more
doaj   +1 more source

Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction [PDF]

open access: yesScience, 2013
Converting Polarization The conversion of a light signal from one polarization direction to another plays an important role in communication and metrology. The components that are presently used for polarization conversion, however, tend to be relatively
N. Grady   +8 more
semanticscholar   +1 more source

Multi-resonant tunable absorber of terahertz metamaterial based on GaAs and VO2

open access: yesResults in Physics, 2023
Based on the fact that the conductivity of photosensitive semiconductors can be regulated by external pump light, a metamaterial absorber with single-band and dual-band switchable in terahertz region is designed by replacing gallium arsenide (GaAs ...
Tingting Yuan   +4 more
doaj  

Giant Tunable Goos–Hänchen Shifts Based on Prism/Graphene Structure in Terahertz Wave Region

open access: yesIEEE Photonics Journal, 2014
We investigate the giant tunable Goos-Hänchen shifts in prism/graphene structure. It is found that large positive and negative lateral Goos-Hänchen shifts can be easily controlled by adjusting the chemical potential of the graphene, which
Li Jiu-Sheng, Wu Jing-fang, Zhang Le
doaj   +1 more source

Four-Dimensional Micro/Nanorobots via Laser Photochemical Synthesis towards the Molecular Scale

open access: yesMicromachines, 2023
Miniaturized four-dimensional (4D) micro/nanorobots denote a forerunning technique associated with interdisciplinary applications, such as in embeddable labs-on-chip, metamaterials, tissue engineering, cell manipulation, and tiny robotics.
Yufeng Tao   +8 more
doaj   +1 more source

Electrical tunability of terahertz nonlinearity in graphene

open access: yesScience Advances, 2021
We turn graphene from an inert electronic material to the most nonlinear material for the terahertz range using a small voltage. Graphene is conceivably the most nonlinear optoelectronic material we know.
S. Kovalev   +17 more
semanticscholar   +1 more source

Tunable Transmissive Terahertz Linear Polarizer for Arbitrary Linear Incidence Based on Low-Dimensional Metamaterials

open access: yesNanomaterials, 2021
In this work, we propose a structure consisting of three metamaterial layers and a metallic grating layer to rotate the polarization of arbitrary linearly polarized incidence to the y-direction with high transmissivity by electrically tuning these ...
Zhenyu Yang   +8 more
doaj   +1 more source

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