Results 121 to 130 of about 99,715 (244)

Axial Multifocus Beams Formed by Binary Optical Elements

IEEE Photonics Journal, 2019
Axial multifocus beams (AMBs) potentially offer convenience in scientific and industrial applications. However, the general approach used for forming AMBs based on the Fresnel zone plate limits the conceivable applications.
Ning Xu, Huan Xiao, Zhe Kong, Qiaofeng Tan   +3 more
doaj   +1 more source

Hybrid-level Fresnel zone plate for diffraction efficiency enhancement

, 2017
The Fresnel Zone Plate (FZP) is widely used in a variety of applications. However, the most concerning drawback of the FZP is its low diffraction efficiency limited by fabrication capability.
Zhiyu Zhang, Chengli Guo, Wang Ruoqiu, Haixiang Hu, Xiaoguang Zhou, Tao Liu, Donglin Xue, Xing Zhang, Feng Zhang, Xuejun Zhang   +9 more
semanticscholar   +1 more source

Tight focusing of laser light using a chromium Fresnel zone plate.

Optics Express, 2017
Using near-field scanning microscopy, we demonstrate that a 15-µm zone plate fabricated in a 70-nm chromium film sputtered on a glass substrate and having a focal length and outermost zone's width equal to the incident wavelength λ = 532 nm, focuses a ...
V. Kotlyar, S. Stafeev, A. Nalimov, M. Kotlyar, L. O’Faolain, E. Kozlova   +5 more
semanticscholar   +1 more source

Imaging Nanoscale Magnetic Structures With Polarized Soft X-Ray Photons

IEEE Photonics Journal, 2010
Imaging nanoscale magnetic structures and their fast dynamics is scientifically interesting and technologically of highest relevance. The combination of circularly polarized soft X-ray photons, which provide a strong X-ray magnetic circular dichroism ...
Peter Fischer, Mi-Young Im
doaj   +1 more source

Generation of a Focused THz Vortex Beam from a Spintronic THz Emitter with a Helical Fresnel Zone Plate. [PDF]

Nanomaterials (Basel), 2023
Zhang X, Xu Y, Hong B, Zhang F, Wang A, Zhao W.   +5 more
europepmc   +1 more source

STUDY OF KINOFORM LENS AS A ZONE PLATE

Вестник Кемеровского государственного университета, 2015
The described laboratory work is devoted to studying one of modern optical elements – diffractive lens – at universities. The description of the work and guidance for its implementation are provided.
G. I. Zaitsev, G. I. Kolesnikov
doaj  

Radio emission from Air Showers. Comparison of theoretical approaches

, 2013
While the fluorescence and the ground counter techniques for the detection of ultra-high energy cosmic rays (UHECR) were being developed for decades, the interest in the radio detection diminished after the initial experiments in the 1960s.
Belov, Konstantin
core   +1 more source

Diffraction characteristics of optical elements designed as phase layers with cosine-profiled periodicity in azimuthal direction

, 2011
The article concerns an investigation of the Fresnel diffraction characteristics of two types of phase optical elements, under Gaussian laser beam illumination. Both elements provide an azimuthal periodicity of the phase retardation.
Beijersbergen, Davis, Davis, Dholakia, Durnin, Durnin, Dyson, Gori, Herman, Holzner, Janicijevic, Khonina, Khonina, Kopitkovas, Kotlyar, Kotlyar, Ljiljana Janicijevic, McGloin, McLeod, Ojeda-Castañeda, Phillips, Suzana Topuzoski, Topuzoski, Turunen   +23 more
core   +1 more source

Phase-Type Fresnel Zone Plate with Multi-Wavelength Imaging Embedded in Fluoroaluminate Glass Fabricated via Ultraviolet Femtosecond Laser Lithography. [PDF]

Micromachines (Basel), 2021
Li Q, Dai X, Shi H, Liu Y, Zhang L.
europepmc   +1 more source

Graphene nanoribbon based plasmonic Fresnel zone plate lenses

, 2017
A graphene-based metamaterial lens is theoretically proposed by combining plasmonic nanoribbons with Fresnel Zone Plate (FZP) architecture to realize wavelength-selective and tunable lensing.
Sunan Deng, H. Butt, K. Jiang, B. Dlubak, P. Kidambi, P. Seneor, Stephane Xavierd, Ali K. Yetisene   +7 more
semanticscholar   +1 more source