Results 31 to 40 of about 767,976 (182)

Optimization of the diffraction efficiency in photorefractive crystals [PDF]

open access: yes, 2017
The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are considered.
Arias Hernández, Néstor Alonso   +3 more
core   +2 more sources

THEORETICAL STUDY OF SURFACE FERROMAGNETISM m-GaN DOPED WITH Mn

open access: yesMomento, 2017
First principles calculations were performed to study the structural, electronic and magnetic properties of the surface of m-GaN doped with manganese (Mn).
Oscar Martínez   +3 more
doaj   +1 more source

The Electronic Structure of NiO by means of Electron Spectroscopies and theoretical calculations [PDF]

open access: yes, 2007
We report experimental and theoretical evidence of surface effects in the Ni 2p x-ray photoemission spectra XPS of NiO. The Ni 2p3/2 surface-enhanced XPS of a NiO sample show a relative enhancement of the intensity of the known satellite at 1.5 eV higher
Soriano de Arpe, Leonardo
core   +1 more source

A simple model for submaximal exchange through the Strait of Gibraltar

open access: yesScientia Marina, 2001
This work presents a simple two-layer model for the water exchange through the Strait of Gibraltar. The model is inspired by the work of Bormans and Garrett (1989) and focus on the case of submaximal exchange with an unique hydraulic control at the ...
Javier Delgado   +2 more
doaj   +1 more source

Parallel illumination for depletion microscopy through acousto-optic spatial light modulation

open access: yesJournal of the European Optical Society-Rapid Publications
State-of-the-art super-resolution microscopy techniques, including Stimulated Emission Depletion (STED), Reversible Saturable Optical Fluorescence Transitions (RESOLFT), and Switching Laser Mode (SLAM) microscopies, implement Laguerre-Gaussian beams ...
Klingmann Fabian   +4 more
doaj   +1 more source

Artifact-free holographic light shaping through moving acousto-optic holograms

open access: yesScientific Reports, 2021
Holographic light modulation is the most efficient method to shape laser light into well-defined patterns and is therefore the means of choice for many intensity demanding applications.
Dorian Treptow   +3 more
doaj   +1 more source

A beyond mean field study of Bose gases in a double-well potential with a Feshbach resonance [PDF]

open access: yes, 2012
The Bose-Hubbard model coupled to a Feshbach resonance is studied. Quantum phase transitions are analyzed within a beyond mean field framework in order to get finite size corrections to the simple mean field approach.
Arias Carrasco, José Miguel   +3 more
core   +1 more source

Coupling Patterns of External Arguments in the Multiple-Spiral Medallions of the Mandelbrot Set

open access: yesDiscrete Dynamics in Nature and Society, 2009
The multiple-spiral medallions are beautiful decorations situated in the proximity of the small copies of the Mandelbrot set. They are composed by an infinity of babies Mandelbrot sets that have external arguments with known structure.
M. Romera   +4 more
doaj   +1 more source

Adaptation of an empirical model for erythemal ultraviolet irradiance [PDF]

open access: yesAnnales Geophysicae, 2007
In this work we adapt an empirical model to estimate ultraviolet erythemal irradiance (UVER) using experimental measurements carried out at seven stations in Spain during four years (2000–2003).
I. Foyo-Moreno   +2 more
doaj   +1 more source

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

open access: yesAdvanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia   +7 more
wiley   +1 more source

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