Results 11 to 20 of about 2,371 (296)
Topological Charge of Light Fields with a Polarization Singularity
Photonics, 2022 We have studied diverse vector and hybrid light fields, including those with multiple polarization singularities, and have derived relationships for polarization singularity indices based on the familiar Berry formula, which is normally utilized to find ...
VÍCTOR V Kotlyar +2 more
exaly +4 more sources
Engineering phase and polarization singularity sheets [PDF]
Nature Communications, 2021 Metasurfaces allow for vast possibilities of light control. Here, the authors demonstrate on-demand engineering and realization of a broad family of two-dimensional phase singularity sheets and transverse polarization singularity sheets, opening up new ...
Soon Wei Daniel Lim +4 more
doaj +7 more sources
Sharp Focusing of a Hybrid Vector Beam with a Polarization Singularity
Photonics, 2021 The key result of this work is the use of the global characteristics of the polarization singularities of the entire beam as a whole, rather than the analysis of local polarization, Stokes and Poincare–Hopf indices.
VÍCTOR V Kotlyar +2 more
exaly +4 more sources
Polarization singularity anisotropy: determining monstardom [PDF]
Optics Letters, 2008 C points, that is, isolated points of circular polarization in transverse fields of varying polarization, are classified morphologically into three distinct types known as lemons, stars, and monstars.
Mark R Dennis
exaly +6 more sources
Acceleration toward polarization singularity inspired by relativistic E×B drift. [PDF]
Sci Rep, 2016 The relativistic trajectory of a charged particle driven by the Lorentz force is different from the classical one, by velocity-dependent relativistic acceleration term.
Yu S, Piao X, Park N.
europepmc +2 more sources
Singularity transformation through single-pass phase modulation of light [PDF]
Scientific ReportsThe emergence of optical vortex phenomena has generated significant interest in optical technologies. By manipulating light parameters such as amplitude, phase, and polarization, new advances have been made in structured light techniques, which enable ...
Laxminarayan +3 more
doaj +2 more sources
A Tuba/Cdc42/Par6A complex is required to ensure singularity in apical domain formation during enterocyte polarization. [PDF]
PLoS ONE, 2018 Apico-basal polarity establishment is a seminal process in tissue morphogenesis. To function properly it is often imperative that epithelial cells limit apical membrane formation to a single domain.
Lucas J M Bruurs +4 more
doaj +4 more sources
Configuring Polarization Singularity Array Composed of C-Point Pairs
IEEE Photonics Journal, 2022 The generation and topological configuration of double-layered polarization singularity array (PSA) having paired C-points of opposite topological index through superposing three Laguerre-Gaussian (LG) component beams with orthogonal linear polarization ...
Xinglin Wang, Zhiyi Li, Zheng Yuan
exaly +3 more sources
Singularity in Polarization: Rewiring Yeast Cells to Make Two Buds [PDF]
Cell, 2009 For budding yeast to ensure formation of only one bud, cells must polarize toward one, and only one, site. Polarity establishment involves the Rho family GTPase Cdc42, which concentrates at polarization sites via a positive feedback loop.
Audrey S Howell +2 more
exaly +2 more sources
IEEE Geoscience and Remote Sensing Letters, 2009 The concept of characteristic polarization states (CPSs) is extended to an ultrawideband (UWB) context by a time-domain approach. This is achieved by a sparse representation of the target UWB temporal response by the singularity expansion model.
Faisal Aldhubaib +2 more
exaly +2 more sources