Results 61 to 70 of about 27,230 (299)
, 2023 Conventional approaches for the identification of liquid chemicals are bulky and harmful to the environment, detect a limited number of chemical species, produce high false alarm rates, or rely on complex/expensive spectrometers.
Jin-Soo Kim (7954) +4 more
core +1 more source
Active nonlocal metasurfaces [PDF]
Nanophotonics, 2020 Abstract Actively tunable and reconfigurable wavefront shaping by optical metasurfaces poses a significant technical challenge often requiring unconventional materials engineering and nanofabrication. Most wavefront‐shaping metasurfaces can be considered “local” in that their operation depends on the responses of individual meta‐units.
Stephanie C. Malek +3 more
openaire +4 more sources
IEEE Access, 2019 In this paper, high-order orbital angular momentum (OAM) vortex beams (OAMVBs) are generated using reflective metasurface. Generating high-order OAMVBs using traditional reflective metasurface methods deteriorates the radiation performance that affects ...
Zaid Akram +7 more
doaj +1 more source
Highly Birefringent Terahertz Metasurfaces Based on a Liquid-Crystal-Embedded Metal Mesh
IEEE Photonics Journal, 2022 Here, we report a metasurface for polarization converters in the terahertz (THz) spectral range. The THz metasurface consists of a metal mesh with subwavelength isotropic apertures and a nematic liquid crystal (LC) that is a uniaxially anisotropic ...
Tomoyuki Sasaki +6 more
doaj +1 more source
Metasurface-enhanced mid-infrared spectrochemical imaging of tissues
, 2023 Label-free and nondestructive mid-infrared vibrational hyperspectral imaging is emerging as an important ex-vivo tissue analysis tool, providing spatially resolved biochemical information critical to understanding physiological and pathological processes.
S. Rosas (14471085) +7 more
core +1 more source
Hybrid Checkerboard Metasurface Combining Passive and Active AMCs [PDF]
Journal of Electromagnetic Engineering and ScienceIn this paper, a hybrid checkerboard metasurface is proposed for controlling radar cross-sections (RCSs) using a small number of active devices. The proposed metasurface consists of passive and active artificial magnetic conductors.
Sung Hoe Kim +3 more
doaj +1 more source
Cancer Diagnosis Using Terahertz-Graphene-Metasurface-Based Biosensor with Dual-Resonance Response
Nanomaterials, 2022 Owing to the outstanding physical properties of graphene, its biosensing applications implemented by the terahertz metasurface are widely concerned and studied.
Chunjian Tan +6 more
doaj +1 more source
Physical layer superimposed dual-band metasurface encryption
Defence TechnologyMetasurface holographic imaging offers advantages such as high spatial resolution and precise image reconstruction, making it highly promising for applications in metasurface encryption.
Chenxia Li +7 more
doaj +1 more source
Metasurface-Based Free-Space Multi-port Beam Splitter with Arbitrary Power Ratio
, 2022 A beam splitter (BS) is one of the most critical building blocks in optical systems. Despite various attempts to miniaturize the conventional cube BS reported, it remains a challenge to realize an ultrathin BS with multi-port output, nonuniform splitting
Xue Feng (147580) +6 more
core +1 more source
Dielectric Meta-Atoms with Liquid Crystal Alignment Effect for Electrically Tunable Metasurface
Advanced Devices & InstrumentationDielectric metasurfaces with tunable functions are increasingly appealing to both the academia and industrial communities. Among the many tuning mechanisms reported so far, metasurface immersed in liquid crystal (LC) stands out as one of the most viable ...
Xin Chang +5 more
doaj +1 more source