Results 11 to 20 of about 11,072 (199)

Efficient Achromatic Broadband Focusing and Polarization Manipulation of a Novel Designed Multifunctional Metasurface Zone Plate

open access: yesNanomaterials, 2021
In this paper, comprehensively utilizing the diffraction theory and electromagnetic resonance effect is creatively employed to design a multifunctional metasurface zone plate (MMZP) and achieve the control of polarization states, while maintaining a ...
Shaobo Ge   +8 more
doaj   +1 more source

A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range

open access: yesPhotonic Sensors, 2022
Metalens are planar lenses composed of the subwavelength arrays, which have unconventional and versatile functionalities to manipulate the light fields compared with the traditional lens. It is noted that the most metalens are designed in a monochromatic
Ye Yuan   +9 more
doaj   +1 more source

Design of high efficiency achromatic metalens with large operation bandwidth using bilayer architecture

open access: yesOpto-Electronic Advances, 2021
Achromatic metalens composed of arrays of subwavelength nanostructures with spatially varying geometries is attractive for a number of optical applications. However, the limited degree of freedom in the single layer achromatic metasurface design makes it
Yilin Wang, Qingbin Fan, Ting Xu
doaj   +1 more source

Wideband and high-efficiency spin-locked achromatic meta-device

open access: yesNanophotonics, 2022
Achromatic devices present unique capabilities in efficient manipulation of waves and have wide applications in imaging and communication systems. However, the research of achromatic devices is limited by the narrow bandwidth, low efficiency as well as ...
Cui Xingshuo   +7 more
doaj   +1 more source

Study of achromatic beamline design for laser-driven femtosecond electron beams

open access: yesHe jishu, 2023
BackgroundThe electron beams produced by laser plasma acceleration have excellent quality for pulse lengths of the order of fs. Due to the existence of a strong laser field, there are difficulties in direct applications, and more applications need to ...
ZHU Jungao   +7 more
doaj   +1 more source

Exploring EEG Effective Connectivity Network in Estimating Influence of Color on Emotion and Memory

open access: yesFrontiers in Neuroinformatics, 2019
Color is a perceptual stimulus that has a significant impact on improving human emotion and memory. Studies have revealed that colored multimedia learning materials (MLMs) have a positive effect on learner’s emotion and learning where it was assessed by ...
Meei Tyng Chai   +6 more
doaj   +1 more source

See-Through Near-Eye Display with Built-in Prescription and Two-Dimensional Exit Pupil Expansion

open access: yesApplied Sciences, 2020
We propose a see-through near-eye display featuring an exit pupil expander (EPE), which is composed of two multiplexed slanted gratings. Via a two-dimensional expansion, the exit pupil (EP) is able to be enlarged up to 10 × 8 mm2.
Wenbo Zhang   +6 more
doaj   +1 more source

Polarization-independent achromatic Huygens’ metalens with large numerical aperture and broad bandwidth

open access: yesNanophotonics, 2023
Achromatic lenses, which have the same focal length regardless of the illumination frequency, find strong applications in imaging, sensing, and communication systems.
He Xiaoluo   +3 more
doaj   +1 more source

Coloronyms in water resource (on the material of German and Kyrgyz languages) [PDF]

open access: yesBIO Web of Conferences
The article is a detailed analysis of linguocultural aspects of the use of coloronyms in professionally marked units, namely in the context of water resources.
Beksultanova Gulzada Azimkanovna   +3 more
doaj   +1 more source

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