Zobrazeno 1 - 10
of 239
pro vyhledávání: '"Dennis Mark R."'
Autor:
Maxwell, Kerr, Dennis, Mark R
We consider the jacobian of a random transverse polarisation field, from the transverse plane to the Poincar\'e sphere, as a Skyrme density partially covering the sphere. Connected domains of the plane where the jacobian has the same sign -- patches
Externí odkaz:
http://arxiv.org/abs/2411.18232
Publikováno v:
Nanophotonics, Vol 8, Iss 8, Pp 1379-1385 (2019)
Flying doughnuts (FDs) are exact propagating solutions of Maxwell equations in the form of single-cycle, space-time non-separable toroidal pulses. Here we review their properties and reveal the existence of a complex and robust fine topological struc
Externí odkaz:
https://doaj.org/article/ac969fad099d465eae062a45b82d9f22
The Ince-Gauss beams, separable in elliptic coordinates, are studied through a ray-optical approach. Their ray structure can be represented over a ray-Poincar\'e sphere by generalized Viviani curves (intersections of a cylinder and a sphere). This re
Externí odkaz:
http://arxiv.org/abs/2310.11175
Autor:
Gadeyne, Titouan, Dennis, Mark R.
We investigate the decomposition of the electromagnetic Poynting momentum density in three-dimensional random monochromatic fields into orbital and spin parts, using analytical and numerical methods. In sharp contrast with the paraxial case, the orbi
Externí odkaz:
http://arxiv.org/abs/2309.07807
We present a study of 3D electromagnetic field zeros, uncovering their remarkable characteristic features and propose a classifying framework. These are a special case of general dark spots in optical fields, which sculpt light's spatial structure in
Externí odkaz:
http://arxiv.org/abs/2301.03540
We consider the representations of the optical Dirac equation, especially ones where the Hamiltonian is purely real-valued. This is equivalent, for Maxwell's equations, to the Majorana representation of the massless Dirac (Weyl) equation. We draw ana
Externí odkaz:
http://arxiv.org/abs/2212.04011
Autor:
Sugic, Danica, Droop, Ramon, Otte, Eileen, Ehrmanntraut, Daniel, Nori, Franco, Ruostekoski, Janne, Denz, Cornelia, Dennis, Mark R.
Publikováno v:
Nature Commun 12, 6785 (2021)
Three-dimensional (3D) topological states resemble truly localised, particle-like objects in physical space. Among the richest such structures are 3D skyrmions and hopfions that realise integer topological numbers in their configuration via homotopic
Externí odkaz:
http://arxiv.org/abs/2107.10810
Publikováno v:
Phys. Rev. Research 2, 042045 (2020)
We consider complex 3D polarizations in the interference of several vector wave fields with different commensurable frequencies and polarizations. We show that the resulting polarizations can form knots, and interfering three waves is sufficient to g
Externí odkaz:
http://arxiv.org/abs/2007.13307
Publikováno v:
Journal of the European Optical Society-Rapid Publications, Vol 1, p 06008 (2006)
Optical vortices (phase singularities) arise from interference and are threads of darkness embedded within light fields. Although usually visualised in terms of their points of intersection with an observation plane, appreciation of their true form r
Externí odkaz:
https://doaj.org/article/b3a53ff0e90645e3a44911e4bd03efc1
Structured light has revolutionized optical particle manipulation and nano-scale material processing. In particular, propagation-invariant structured light fields, such as Bessel beams, have enabled applications that require robust intensity distribu
Externí odkaz:
http://arxiv.org/abs/1911.07678