Results 71 to 80 of about 113,143 (287)

Structural phase transitions of vortex matter in an optical lattice

, 2004
We consider the vortex structure of a rapidly rotating trapped atomic Bose-Einstein condensate in the presence of a co-rotating periodic optical lattice potential.
H. Pu, J. R. Abo-Shaeer, K. Kern, L. O. Baksmaty, N. P. Bigelow, R. Newell, S. Yi, Z. Chen   +7 more
core   +1 more source

Prediction of Surface Topography Parameters in Direct Laser Interference Patterning of Stainless Steel Using Infrared Monitoring and Convolutional Neural Networks

Advanced Engineering Materials, EarlyView.
This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky, Marcelo Sallese, Leander Kläber, Clemens Kuhn, Keming Du, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Optical vortices and vortex solitons [PDF]

, 2005
Optical vortices are phase singularities nested in electromagnetic waves that constitute a fascinating source of phenomena in the physics of light and display deep similarities to their close relatives, quantized vortices in superfluids and Bose-Einstein condensates.
Desyatnikov, Anton S, Torner, Lluis, Kivshar, Yuri   +2 more
openaire   +2 more sources

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Optical Vortex-Pumped KTiOAsO₄ Narrow-Linewidth Picosecond-Pulsed Parametric Oscillator

Applied Sciences
Herein, we present a picosecond-pulsed optical vortex parametric oscillator capable of generating high-power, narrow-linewidth near- and mid-infrared optical vortex outputs.
Xiazhuo Jiao, Jianqiang Ye, Mailikeguli Aihemaiti, Yuxia Zhou, Sujian Niu, Xining Yang   +5 more
doaj   +1 more source

Stability of vortex solitons in a photorefractive optical lattice

, 2003
Stability of off-site vortex solitons in a photorefractive optical lattice is analyzed. It is shown that such solitons are linearly unstable in both the high and low intensity limits.
Abo-Shaeer J R, Aceves A B, Cai D, Christodoulides D N, Efremidis N K, Eisenberg H S, Firth W J, Jianke Yang, Madison K W, Matthews M R, Musslimani Z, Petviashvili V I, Swartzlander G A, Vakhitov N G, Yang J   +14 more
core   +2 more sources

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Single- and double-vortex vector solitons in self-focusing nonlinear media

, 2004
We study two-component spatial optical solitons carrying an angular momentum and propagating in a self-focusing saturable nonlinear medium. When one of the components is small, such vector solitons can be viewed as a self-trapped vortex beam that guides ...
Kivshar, Yuri S., Salgueiro, Jose R.
core   +1 more source

Bose-Fermi Mixtures in Optical Lattices [PDF]

, 2005
Using mean field theory, we have studied Bose-Fermi mixtures in a one-dimensional optical lattice in the case of an attractive boson-fermion interaction.
A. L. Fetter, C. C. Bradley, C. J. Pethick, F. Dalfovo, G. Modugno, J. J. Garcia-Ripoll, J. R. Abo-Shaeer, K. B. Davis, K. W. Madison, L. Pitaevskii, M. Barranco, M. Centelles, M. Guilleumas, M. H. Anderson, M. Pi, M. R. Matthews, Ph. W. Courteille, R. G. Parr, R. J. Donnelly, R. Mayol, W. Zwerger   +20 more
core   +2 more sources

Sub-Rayleigh optical vortex coronagraphy

Optics Express, 2012
We introduce a new optical vortex coronagraph (OVC) method to determine the angular distance between two sources when the separation is sub-Rayleigh. We have found a direct relationship between the position of the minima and the source angular separation. A priori knowledge about the location of the two sources is not required.
MARI, ELETTRA, TAMBURINI, FABRIZIO, G. A. Swartzlander J.r., BIANCHINI, ANTONIO, BARBIERI, CESARE, ROMANATO, FILIPPO, B. Thidé   +6 more
openaire   +2 more sources