Results 41 to 50 of about 45,495 (276)
Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain
Frontiers in Physics, 2020 In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the ...
Yufei Gao +7 more
doaj +1 more source
Tests of achromatic phase shifters performed on the SYNAPSE test bench: a progress report [PDF]
, 2008 The achromatic phase shifter (APS) is a component of the Bracewell nulling interferometer studied in preparation for future space missions (viz. Darwin/TPF-I) focusing on spectroscopic study of Earth-like exo-planets.
Barillot, Marc +18 more
core +1 more source
Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules [PDF]
, 2016 Metasurfaces are nano-structured devices composed of arrays of subwavelength scatterers (or meta-atoms) that manipulate the wavefront, polarization, or intensity of light.
Arbabi, Amir +4 more
core +3 more sources
Generalized metric for broadband flat lens performance comparison
Nanophotonics, 2022 A plethora of metalenses and diffractive lenses (“flat lenses”) have been demonstrated over the years. Recently, attempts have been made to stretch their performance envelope, particularly in the direction of wide-band achromatic performance.
Engelberg Jacob, Levy Uriel
doaj +1 more source
Rates for Color Shifted Microlensing Events [PDF]
, 1995 If the objects responsible for gravitational microlensing (ML) of Galactic-bulge stars are faint dwarfs, then blended light from the lens will distort the shape of the ML light curve and shift the color of the observed star during the event.
Buchalter, Ari +2 more
core +2 more sources
Xibei Gongye Daxue Xuebao, 2023 This paper proposes the use of aperture sharing synergistic operation in the structure of the metalens, together with the rational selection of the scattering unit size according to the linear relationship between the output phase and frequency of the ...
LYU Shuyuan +4 more
doaj +1 more source
Spatial Facilitation by Color and Luminance Edges: Boundary, Surface, and Attentional Factors [PDF]
, 1998 The thresholds of human observers detecting line targets improve significantly when the targets are presented in a spatial context of collinear inducing stimuli. This phenomenon is referred to as 'spatial facilitation', and may reflect the output of long-
Dresp, Birgitta, Grossberg, Stephen
core +1 more source
Dispensing Volumetric Additive Manufacturing
Advanced Functional Materials, EarlyView.Dispensing volumetric additive manufacturing (DVAM) prints 3D structures inside a photocurable resin droplet suspended from the tip of a glass pipette, enabling sequential printing without resin vats or manual part removal. Real‐time droplet profiling and ray‐tracing‐based correction compensate for optical distortion at the curved resin‐air interface ...
Hongryung Jeon +5 more
wiley +1 more source
Chromatic signals control proboscis movements during hovering flight in the hummingbird hawkmoth Macroglossum stellatarum. [PDF]
PLoS ONE, 2012 Most visual systems are more sensitive to luminance than to colour signals. Animals resolve finer spatial detail and temporal changes through achromatic signals than through chromatic ones.
Joaquín Goyret, Almut Kelber
doaj +1 more source
DNA‐Origami‐Assembled Rhodium Nanoantennas for Deep‐UV Label‐Free Single‐Protein Detection
Advanced Functional Materials, EarlyView.Deep‐UV autofluorescence of single proteins in DNA origami‐based rhodium nanoantennas. Precisely positioned within the plasmonic nanogap, proteins retain their native state while their intrinsic emission is strongly amplified, enabling label‐free single‐molecule detection and opening new opportunities for highly sensitive and specific biosensing ...
Nicco Corduri +8 more
wiley +1 more source