Results 51 to 60 of about 43,576 (316)

Polarization structure of optical vortices in inclined Laguerre-Gaussian beams passed through a uniaxial crystal

open access: yesКомпьютерная оптика
The work shows that in linearly polarized Laguerre-Gaussian beams passing through an anisotropic medium at an angle to the optical axis of the crystal, the distribution of optical vortices is devoid of axial symmetry. It is shown that the trajectories of
Yu.A. Egorov, A.F. Rubass
doaj   +1 more source

Multiplexed vortex beam-based optical tweezers generated with spiral phase mask

open access: yesiScience, 2023
Summary: The design and implementation of a multiplexed spiral phase mask in an experimental optical tweezers setup are presented. This diffractive optical element allows the generation of multiple concentric vortex beams with independent topological ...
Francisco M. Muñoz-Pérez   +5 more
doaj   +1 more source

Vortex-vortex control in exciton-polariton condensates

open access: yes, 2017
Vortices are widely studied in fields ranging from nonlinear optics to magnetic systems and superconductors. A vortex carries a binary information corresponding to its topological charge, `plus' or `minus', that can be used for information storage and ...
Ma, Xuekai, Schumacher, Stefan
core   +1 more source

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

open access: yesMolecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff   +11 more
wiley   +1 more source

Determining Vortex-Beam Superpositions by Shear Interferometry

open access: yesPhotonics, 2018
Optical modes bearing optical vortices are important light systems in which to encode information. Optical vortices are robust features of optical beams that do not dissipate upon propagation.
Behzad Khajavi   +2 more
doaj   +1 more source

SmallTalk: a novel small‐sized fusion tag for peptide expression and purification

open access: yesFEBS Open Bio, EarlyView.
The SmallTalk fusion tag allows for the efficient expression and purification of soluble recombinant proteins or peptides in Escherichia coli. Testing with SmallTalk‐GFP confirmed that the proteins were soluble and folded correctly, while SmallTalk‐Bin1b maintained its antimicrobial activity against various bacterial isolates. This streamlined workflow
Atika Tariq   +3 more
wiley   +1 more source

Astigmatic transformation of a fractional-order edge dislocation

open access: yesКомпьютерная оптика, 2022
It is shown theoretically that an astigmatic transformation of an edge dislocation (straight line of zero intensity) of the ν-th order (ν=n+α is a real positive number, n is integer ...
V.V. Kotlyar   +3 more
doaj   +1 more source

Diffusion induced decoherence of stored optical vortices

open access: yes, 2007
We study the coherence properties of optical vortices stored in atomic ensembles. In the presence of thermal diffusion, the topological nature of stored optical vortices is found not to guarantee slow decoherence.
Jiang, L.   +3 more
core   +1 more source

Optical Surface Vortices and Their Use in Nanoscale Manipulation [PDF]

open access: yes, 2009
Following a brief overview of the physics underlying the interaction of twisted light with atoms at near-resonance frequencies, the essential ingredients of the interaction of atoms with surface optical vortices are described.
Andrews, D. L.   +2 more
core   +1 more source

Optical vortices and vortex solitons [PDF]

open access: yes, 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   +2 more
openaire   +2 more sources

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