Results 41 to 50 of about 42,732 (290)

Highly efficient multicolor multifocus microscopy by optimal design of diffraction binary gratings

Scientific Reports, 2017
Multifocus microscopy (MFM) allows sensitive and fast three-dimensional imaging. It relies on the efficient design of diffraction phase gratings yielding homogeneous intensities in desired diffraction orders. Such performances are however guaranteed only
Bassam Hajj, Laura Oudjedi, Jean-Bernard Fiche, Maxime Dahan, Marcelo Nollmann   +4 more
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility

AIP Advances, 2019
The recent development of phase-grating moiré neutron interferometry promises a wide range of impactful experiments from dark-field imaging of material microstructure to precise measurements of fundamental constants.
B. Heacock, D. Sarenac, D. G. Cory, M. G. Huber, D. S. Hussey, C. Kapahi, H. Miao, H. Wen, D. A. Pushin   +8 more
doaj   +1 more source

Large bandwidth, highly efficient optical gratings through high index materials [PDF]

, 2008
We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection ...
Baldry, Clausnitzer, Clausnitzer, Clausnitzer, Ebizuka, Gibson, H. L. Offerhaus, Helmut Rathgen, Kogelnik, Limpert, Liu, Marciante, Moharam, Nguyen, Nishii, Néauport, Rhee, Tamura   +17 more
core   +5 more sources

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Light trapping within the grooves of 1D diffraction gratings under monochromatic and sunlight illumination

, 2011
The Rayleigh-Modal method is used to calculate the electromagnetic field within the grooves of a perfectly conducting, rectangular-shaped 1D diffraction grating. An \emph{enhancement coefficient} ($\eta$) is introduced in order to quantify such an energy
Crouse, Depine, Francisco Llopis, Glass, Lee, Llopis, Lochbihler, Mario M. Jakas, Philipp, Wang, Wirgin   +10 more
core   +1 more source

Grazing Incidence Small Angle X-Ray Scattering (GISAXS) on Small Targets Using Large Beams [PDF]

, 2017
GISAXS is often used as a versatile tool for the contactless and destruction-free investigation of nanostructured surfaces. However, due to the shallow incidence angles, the footprint of the X-ray beam is significantly elongated, limiting GISAXS to ...
Krumrey, Michael, Pflüger, Mika, Probst, Jürgen, Scholze, Frank, Soltwisch, Victor   +4 more
core   +5 more sources

Magnetic Control of Chiral Hybridized Phonon Magnetic Moments in Ferrimagnets Fe2‐xZnxMo3O8

Advanced Functional Materials, EarlyView.
Helicity‐resolved magneto‐Raman spectroscopy reveals magnetic control of chiral phonon magnetic moments in polar ferrimagnet (ZnxFe2−xMo3O₈). Large spontaneous zero‐field phonon splittings, selective phonon–magnon coupling, and asymmetric Zeeman responses demonstrate that phonon chirality is governed by magnon‐phonon coupling and magnetization.
Youngsu Choi, Dirk Wulferding, Amit Pawbake, Clément Faugeras, Sivasakthi Kuppusamy, Raman Sankar, Gichan Son, Jeongwoo Kim, Kwang‐Yong Choi   +8 more
wiley   +1 more source

A modified method of variable separation for the problem of TE wave diffraction on a diffraction grating with two-layer lines in the period

Учёные записки Казанского университета: Серия Физико-математические науки
The diffraction of an electromagnetic TE wave on multilayer diffraction gratings with several two-layer lines in the period was investigated. Such optical structures are employed in spectral beam combining.
Yu. G. Smirnov, V. Yu. Martynova
doaj   +1 more source

Characterization of a new photorefractive material: Kl-yLyT1-xNx [PDF]

, 1992
We report the growth and characterization of a new photorefractive material, potassium lithium tantalate niobate (KLTN). A KLTN crystal doped with copper is demonstrated to yield high diffraction efficiency of photorefractive gratings in the paraelectric
Agranat, Aharon, Hofmeister, Rudy, Yariv, Amnon   +2 more
core