Results 111 to 120 of about 1,347 (193)

Optical characterisation of micro-fabricated Fresnel zone plates for atomic waveguides [PDF]

, 2020
We optically assess Fresnel zone plates (FZPs) that are designed to guide cold atoms. Imaging of various ring patterns produced by the FZPs gives an average RMS error in the brightest part of the ring of 3% with respect to trap depth.
Johnson, M. Y. H., Griffin, P. F., Henderson, V. A., Kale, Y. B., Arnold, A. S., Riis, E.   +5 more
core  

Measurement and compensation of misalignment in double-sided hard X-ray Fresnel zone plates. [PDF]

J Synchrotron Radiat, 2020
Yurgens V, Koch F, Scheel M, Weitkamp T, David C.   +4 more
europepmc   +1 more source

Sharp acoustic vortex focusing by Fresnel-spiral zone plates [PDF]

We report the optimal focusing of acoustic vortex beams by using flat lenses based on a Fresnel- spiral diffraction grating. The flat lenses are designed by spiral-shaped Fresnel zone plates composed of one or several arms.
Garcia Raffi, Luis Miguel, Staliunas, Kestutis, Romero García, Vicenç, Jimenez, Noe   +3 more
core  

Tunable hard x-ray nanofocusing with Fresnel zone plates fabricated using deep etching. [PDF]

Optica, 2020
Li K, Ali S, Wojcik M, De Andrade V, Huang X, Yan H, Chu YS, Nazaretski E, Pattammattel A, Jacobsen C.   +9 more
europepmc   +1 more source

Author Correction: Nanofocusing of hard X-ray free electron laser pulses using diamond based Fresnel zone plates. [PDF]

Sci Rep, 2020
David C, Gorelick S, Rutishauser S, Krzywinski J, Vila-Comamala J, Guzenko VA, Bunk O, Färm E, Ritala M, Cammarata M, Fritz DM, Barrett R, Samoylova L, Grünert J, Sinn H.   +14 more
europepmc   +1 more source

Polarization diffraction grating produced by femtosecond laser nanostructuring in glass [PDF]

We demonstrate polarization sensitive diffractive optical element fabrication by femtosecond direct writing in the bulk of silica glass. Modulation of the anisotropic properties is produced by controlling light-induced self-assembled nano ...
Kazansky, P.G., Beresna, M.
core  

Producing focused extreme ultraviolet vortex with Fermat-spiral photon sieves

PhotoniX
Extreme ultraviolet (EUV) light is difficult to focus due to strong absorption of most materials. Photon sieves (PS), rather than Fresnel zone plates (FZP), can focus EUV to smaller spot and suppress the higher orders of secondary maxima by several ...
Junyong Zhang, Huaiyu Cui, Yuanyuan Liu, Xiuping Zhang, You Li, Dongdi Zhao, Yongpeng Zhao, Qiwen Zhan   +7 more
doaj   +1 more source

Nonlinear Metasurface Fresnel Zone Plates for Terahertz Generation and Manipulation. [PDF]

Nano Lett, 2019
Minerbi E, Keren-Zur S, Ellenbogen T.
europepmc   +1 more source

3D Nanofabrication of High-Resolution Multilayer Fresnel Zone Plates. [PDF]

Adv Sci (Weinh), 2018
Sanli UT, Jiao C, Baluktsian M, Grévent C, Hahn K, Wang Y, Srot V, Richter G, Bykova I, Weigand M, Schütz G, Keskinbora K.   +11 more
europepmc   +1 more source

Reference Phase of Fresnel Zone Plates

, 2003
The standard zone plate assumes that the shortest ray connecting a radiation source and a detection point has a phase of 0 deg thereby defining a reference phase. Here we examine the experimental consequences of varying this reference phase from 0 deg to 360 deg. It is concluded that reference phase is an intrinsic and useful property of zone plates.
openaire   +2 more sources