Results 41 to 50 of about 99,715 (244)
COMPUTER-GENERATED HOLOGRAM ETCHED IN GAAS FOR OPTICAL INTERCONNECTION OF VLSI CIRCUITS [PDF]
, 1992 By integrating, on a wafer plane, GaAs semiconductor optoelectronic modulators and detectors with computer-generated holograms between then, the potential for in-plane interconnections is proposed.
CAREY, CD +4 more
core +1 more source
Achromatic acoustic generalized phase-reversal zone plates
New Journal of Physics, 2022 We report an achromatic acoustic generalized phase-reversal zone plate by harnessing the response of dipole and monopole, which eliminate the chromatic aberration of conventional zone plates.
Gaokun Yu, Xinyu Zou, Peifeng Wang
doaj +1 more source
Zone-plate focusing of Bose-Einstein condensates for atom optics and erasable high-speed lithography of quantum electronic components [PDF]
, 2009 We show that Fresnel zone plates, fabricated in a solid surface, can sharply focus atomic Bose-Einstein condensates that quantum reflect from the surface or pass through the etched holes.
A M Martin +17 more
core +2 more sources
A beam steering antenna based on Fresnel zone plate radome
Electronics Letters, 2021 In this study, a beam steering antenna was presented, comprising patch antenna and two layers of Fresnel zone plate (FZP). One of the FZP was a fixed structure, the other was a 1‐D collapsible radome with alternately deployed metal strips covering and ...
Yuting Wu +3 more
doaj +1 more source
Journal of Synchrotron Radiation, 2022 An X-ray computed nano-tomography (nano-CT) system has been established at the BL33XU beamline of SPring-8. The optical system consists of pseudo-Köhler illumination with a sector condenser zone plate, an apodization Fresnel zone plate as the objective ...
Satoshi Yamaguchi +8 more
doaj +1 more source
Generalised photon sieves: fine control of complex fields with simple pinhole arrays [PDF]
, 2015 Spatial shaping of light beams has led to numerous new applications in fields such as imaging, optical communication, and micromanipulation. However, structured radiation is less well explored beyond visible optics, where methods for shaping fields are ...
Li, F. +3 more
core +1 more source
Terahertz metasurface zone plates with arbitrary polarizations to a fixed polarization conversion
Opto-Electronic Science, 2022 Metasurfaces that can realize the polarization manipulation of electromagnetic waves on the sub-wavelength scale have become an emerging research field. Here, a novel strategy of combining the metasurface and Fresnel zone plate to form a metasurface zone
Zhen Yue +10 more
doaj +1 more source
Analysis, Design and Fabrication of centimeter-wave Dielectric Fresnel Zone Plate Lens and reflector [PDF]
, 2005 Fresnel lens has a long history in optics. This concept at non-optical wavelengths is also applicable. In this paper we report design and fabrication of a half and quarter wave dielectric Fresnel lens made of Plexiglas, and a Fresnel reflector at 11.1 ...
A. Mahmoudi +11 more
core +2 more sources
MRI Compatible Planar Material Acoustic Lenses
Applied Sciences, 2018 Zone plate lenses are used in many areas of physics where planar geometry is advantageous in comparison with conventional curved lenses. There are several types of zone plate lenses, such as the well-known Fresnel zone plates (FZPs) or the more recent ...
Daniel Tarrazó-Serrano +4 more
doaj +1 more source
Компьютерная оптика, 2022 Using a finite-difference time-domain method, it has been shown that focal spots generated when tightly focusing a linearly polarized Gaussian beam by a Fresnel zone plate (FZP) and when focusing a Gaussian beam with an embedded optical vortex by a ...
A.A. Savelyeva, E.S. Kozlova
doaj +1 more source