Results 41 to 50 of about 4,317 (190)
Designing high-efficiency extended depth-of-focus metalens via topology-shape optimization
Nanophotonics, 2022 Longitudinal optical field modulation is of critical importance in a wide range of applications, including optical imaging, spectroscopy, and optical manipulation.
Zheng Yuhan +8 more
doaj +1 more source
Slow waves in locally resonant metamaterials line defect waveguides [PDF]
, 2016 In the past decades, many efforts have been devoted to the temporal manipulation of waves, especially focusing on slowing down their propagation. In electromagnetism, from microwave to optics, as well as in acoustics or for elastic waves, slow wave ...
Berthelot, Thomas +5 more
core +4 more sources
Erratum: Soret Fishnet Metalens Antenna [PDF]
Scientific Reports, 2015 At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without the need of large profiles. Unfortunately, they also present larger Fresnel reflection loss than conventional lenses. This is usually tackled by implementing unattractive cumbersome designs.
Orazbayev, B +5 more
openaire +3 more sources
Specialized directional beaming through a metalens and a typical application
Nanophotonics, 2018 The anomalous beaming effect of the periodic metallic corrugations functioning as a special case of kSP=2π/Λ is discussed and verified by means of both theoretical calculation and experimental probing.
Zhao Kangyi +3 more
doaj +1 more source
Resonant Metalenses for Breaking the Diffraction Barrier
, 2010 We introduce the resonant metalens, a cluster of coupled subwavelength resonators. Dispersion allows the conversion of subwavelength wavefields into temporal signatures while the Purcell effect permits an efficient radiation of this information in the ...
E. Purcell +7 more
core +1 more source
Holographic Resonant Laser Printing of metasurfaces using plasmonic template [PDF]
, 2018 Laser printing with a spatial light modulator (SLM) has several advantages over conventional raster-writing and dot-matrix display (DMD) writing: multiple pixel exposure, high power endurance and existing software for computer generated holograms (CGH ...
Carstensen, Marcus S. +5 more
core +3 more sources
Metalens-Based Miniaturized Optical Systems [PDF]
Micromachines, 2019 Metasurfaces have been studied and widely applied to optical systems. A metasurface-based flat lens (metalens) holds promise in wave-front engineering for multiple applications. The metalens has become a breakthrough technology for miniaturized optical system development, due to its outstanding characteristics, such as ultrathinness and cost ...
Bo Li, Wibool Piyawattanametha, Zhen Qiu
openaire +3 more sources
Inverse design of sub-diffraction focusing metalens by adjoint-based topology optimization
New Journal of Physics, 2023 Breaking the diffraction limit to realize imaging at the nanoscale is challenging in scientific research. Traditional sub-diffraction focusing metalens is obtained by arranging artificially selected unit cells, of which the design process is passive and ...
Lianhong Dong +7 more
doaj +1 more source
Design of Polarization-Independent Reflective Metalens in the Ultraviolet–Visible Wavelength Region
Nanomaterials, 2021 Flat lens or metalens, as one of the most important application branches of metasurfaces, has recently been attracting significant research interest. Various reflective and transmissive metalenses have been demonstrated in the terathertz, infrared and ...
Huifang Guo +6 more
doaj +1 more source
Monocular depth sensing using metalens
Nanophotonics, 2023 Abstract 3-D depth sensing is essential for many applications ranging from consumer electronics to robotics. Passive depth sensing techniques based on a double-helix (DH) point-spread-function (PSF) feature high depth estimation precision, minimal power consumption, and reduced system complexity compared to active sensing methods.
Fan Yang +4 more
openaire +3 more sources