Results 51 to 60 of about 107,392 (290)

Scattering of Partially Coherent Vector Beams by a Deterministic Medium Having Parity-Time Symmetry

open access: yesPhotonics, 2022
We study the scattering properties of the partially coherent vector beams with the deterministic media having the classic symmetric and parity-time (PT) symmetric scattering potential functions.
Xuan Zhang   +3 more
doaj   +1 more source

Scintillation reduction for combined Gaussian-vortex beam propagating through turbulent atmosphere

open access: yes, 2011
We numerically examine the spatial evolution of the structure of coherent and partially coherent laser beams (PCBs), including the optical vortices, propagating in turbulent atmospheres.
Berman, G. P.   +2 more
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Entanglement and Complete Positivity: Relevance and Manifestations in Classical Scalar Wave Optics

open access: yes, 2017
Entanglement of states and Complete Positivity of maps are concepts that have achieved physical importance with the recent growth of quantum information science. They are however mathematically relevant whenever tensor products of complex linear (Hilbert)
Arvind, Chaturvedi, S., Mukunda, N.
core   +1 more source

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

open access: yesAdvanced 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   +5 more
wiley   +1 more source

X-ray beam quality after a mirror reflection: Experimental and simulated results for a toroidal mirror in a 4th generation storage-ring beamline [version 1; peer review: 2 approved]

open access: yesOpen Research Europe, 2023
Background The surface errors found in X-ray mirrors constitute a limiting factor for preserving beam quality. This is particularly important when the X-ray beam has low emittance and a significant coherence fraction, like in newly upgraded synchrotron ...
Juan Reyes-Herrera   +5 more
doaj   +1 more source

Experimental demonstration of entanglement assisted coding using a two-mode squeezed vacuum state [PDF]

open access: yes, 2004
We have experimentally realized the scheme initially proposed as quantum dense coding with continuous variables [Ban, J. Opt. B \textbf{1}, L9 (1999), and Braunstein and Kimble, \pra\textbf{61}, 042302 (2000)].
Akira Furusawa   +4 more
core   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

open access: yesAdvanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé   +5 more
wiley   +1 more source

Recovery of Schell-model partially coherent beams [PDF]

open access: yesOptics Letters, 2014
Partially coherent light is often preferable to its completely coherent counterpart in applications such as imaging, sensing, and free-space optical communications. To fully exploit its advantages, techniques able to retrieve information carried by the beam are required. Here, we develop and experimentally demonstrate a phase-space optics technique for
Rodrigo Martín-Romo, José Augusto   +1 more
openaire   +4 more sources

Compressive Direct Imaging of a Billion-Dimensional Optical Phase-Space [PDF]

open access: yes, 2018
Optical phase-spaces represent fields of any spatial coherence, and are typically measured through phase-retrieval methods involving a computational inversion, interference, or a resolution-limiting lenslet array.
Howell, John C.   +3 more
core   +3 more sources

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