Results 81 to 90 of about 20,833 (309)
High-efficiency generation of bi-functional holography with metasurfaces
NanophotonicsHolography is a highly desired technology in modern photonics, yet setups for traditional generating methods suffer from complexity and bulky sizes. While metasurface-based holography exhibits advantages of compactness and easy-fabrication, most meta ...
Dai Changhong +3 more
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Spin-Selective Transmission and Devisable Chirality in Two-Layer Metasurfaces
Scientific Reports, 2017 Chirality is a nearly ubiquitous natural phenomenon. Its minute presence in most naturally occurring materials makes it incredibly difficult to detect.
Zhancheng Li +4 more
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Advanced Materials Technologies, EarlyView.Left: Illustration of the glass & nanostructures system and the NIR emission at 1.5 µm, where the colored spheres represent the Er3+ ions within the doped glass. Right: Representation of the Stark splitting of the 4I13/2 and 4I15/2 manifolds of the Er3+, illustrating how the plasmonic modes facilitate the emission from the broader Stark manifold ...
Gaston Lozano Calderón +5 more
wiley +1 more source
Recent Advances in Dielectric Chiral Metasurfaces
Advanced Physics ResearchNatural chiral materials commonly possess weak chirality. Strong chirality can be achieved using chiral metasurfaces or metamaterials consisting of atom‐like subwavelength units. Chiral metasurfaces, as a surface layer of subwavelength units, have gained
Zhipeng Hu +6 more
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Scalable and High-Throughput Top-Down Manufacturing of Optical Metasurfaces
Sensors, 2020 Metasurfaces have shown promising potential to miniaturize existing bulk optical components thanks to their extraordinary optical properties and ultra-thin, small, and lightweight footprints.
Taejun Lee +5 more
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Chirality encoding in resonant metasurfaces governed by lattice symmetries
Chiral metasurfaces provide invaluable tools for controlling structured light required for biosensing, photochemistry, holography, and quantum photonics.
Toftul, Ivan +8 more
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Theory and applications of coherently-illuminated metasurfaces
, 2023 Just as natural materials are composed of atoms and molecules, metamaterials are meticulously crafted by arranging specifically engineered sub-wavelength particles, known as meta-atoms, into a three-dimensional structure.
Cuesta, Francisco S.
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Spacer‐Less Substrate‐Integrated Metasurface for Near‐Unity Terahertz Absorption
Advanced Optical Materials, EarlyView.ABSTRACT Although conventional metal‐insulator‐metal (MIM) terahertz (THz) absorbers can provide near‐unity absorption, their multilayer stacks inevitably introduce additional thickness, mass, and residual stress, which limit their compatibility with THz thermal sensing platforms.
Zihao Zhao +6 more
wiley +1 more source
Design for Highly Efficient Nanometagratings and Theory of Extreme Subdiffraction Photon Control
Advanced Photonics Research, 2022 Conventional planar metasurfaces are always much larger than the wavelength level. Previous studies on extreme wavefront control based on superoscillation suggest a fundamental tradeoff between the size and efficiency of diffraction‐based metasurfaces ...
Yan-ming Gao, Xiang-yang Yu
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Programmable Acoustic Metasurfaces [PDF]
Advanced Functional Materials, 2019 AbstractMetasurfaces open up unprecedented potential for wave engineering using subwavelength sheets. However, a severe limitation of current acoustic metasurfaces is their poor reconfigurability to achieve distinct functions on demand. Here a programmable acoustic metasurface that contains an array of tunable subwavelength unit cells to break the ...
Zhenhua Tian +7 more
openaire +3 more sources