Results 101 to 110 of about 8,681 (211)

High-throughput synthesis of modified Fresnel zone plate arrays via ion beam lithography

Beilstein Journal of Nanotechnology, 2018
Fresnel zone plates (FZP) are diffractive photonic devices used for high-resolution imaging and lithography at short wavelengths. Their fabrication requires nano-machining capabilities with exceptional precision and strict tolerances such as those ...
Kahraman Keskinbora, Umut Tunca Sanli, Margarita Baluktsian, Corinne Grévent, Markus Weigand, Gisela Schütz   +5 more
doaj   +1 more source

Model of in-situ focusing of extreme ultraviolet high-order harmonics from a nanostructured MgO surface

JPhys Photonics
We present a numerical model for the in-situ generation and focusing of extreme-ultraviolet (XUV) high harmonics via a Fresnel zone plate etched into a dielectric (MgO) surface.
Parnia Bastani, Aleksey Korobenko, Vedran Jelic, Jesse Thompson, Anton Rudenko, Francois Légaré, Lora Ramunno, Giulio Vampa   +7 more
doaj   +1 more source

Takagi-Taupin Description of X-ray Dynamical Diffraction from Diffractive Optics with Large Numerical Aperture

, 2007
We present a formalism of x-ray dynamical diffraction from volume diffractive optics with large numerical aperture and high aspect ratio, in an analogy to the Takagi-Taupin equations for strained single crystals.
A. Authier, Albert Macrander, D. Taupin, E. Spiller, E. T. Copson, G. Brian Stephenson, Hanfei Yan, Hyon Chol Kang, J. Maser, Jörg Maser, L. Solymar, M. Born, Qun Shen, R. R. A. Syms, Stefan Vogt, Z. G. Pinsker   +15 more
core   +1 more source

Gamma-Ray Telescopes (in "400 Years of Astronomical Telescopes")

, 2009
The last half-century has seen dramatic developments in gamma-ray telescopes, from their initial conception and development through to their blossoming into full maturity as a potent research tool in astronomy.
AJ Bird, CE Fichtel, F Lebrun, FA Harrison, G Boella, G Bélanger, G Kanbach, GD Badhwar, GJ Perlow, GJ Perlow, GK Skinner, J Tueller, JD Kurfess, JD Kurfess, John K. Cannizzo, KS Wood, N Gehrels, N Gehrels, Neil Gehrels, P Ballmoos von, RC Hartman, RW Klebesadel, SD Barthelmy, V Schönfelder, V Schönfelder, V Schönfelder, WL Kraushaar, WN Johnson   +27 more
core   +1 more source

Frontiers in imaging magnetism with polarized x-rays

Frontiers in Physics, 2015
Although magnetic imaging with polarized x-rays is a rather young scientific discipline, the various types of established x-ray microscopes have already taken an important role in state-of-the-art characterization of the properties and behavior of spin ...
Peter eFischer, Peter eFischer
doaj   +1 more source

Generation of extremely high-intensity tightly focused laser pulse via microstructured plasma target [PDF]

Matter and Radiation at Extremes
Plasma-based optical elements can withstand laser intensities several orders of magnitude higher than traditional optical elements, making them highly promising for manipulating relativistic intensity laser pulses.
Jingyi Wang, Lingyu Zhang, Hao Zhang, Zhidong Chen, Ke Liu, Xinyan Li, Lixiang Hu, Tongpu Yu   +7 more
doaj   +1 more source

Comparison of different sources for laboratory X-ray microscopy

, 2012
This paper describes the setup of two different solutions for laboratory X-ray microscopy working with geometric magnification. One setup uses thin-film transmission targets with an optimized tungsten-layer thickness and the electron gun and optics of an
Ebensperger, Thomas, Hanke, Randolf, Nachtrab, Frank, Stahlhut, Philipp, Zabler, Simon   +4 more
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

Tunable Casimir repulsion with three dimensional topological insulators

, 2011
In this Letter, we show that switching between repulsive and attractive Casimir forces by means of external tunable parameters could be realized with two topological insulator plates.
Adolfo G. Grushin, Alberto Cortijo, H. B. G. Casimir   +2 more
core   +1 more source

Fresnel Interferometric Imager: ground-based prototype

, 2009
The Fresnel Interferometric Imager is a space-based astronomical telescope project yielding milli-arc second angular resolution and high contrast images with loose manufacturing constraints.
Baez, Baez, Chesnokov, Faklis, Faklis, Guyon, Hasman, Hyde, Kipp, Koechlin, Koechlin, Levy, Nisenson, Serre, Soret, Swanson   +15 more
core   +1 more source