4 papers · 1 filter
Torsional selection rule for the spin--orbit conversion of light
Edilberto O. Silva
Standard Pancharatnam-Berry and linear-birefringent media convert optical spin into orbital angular momentum (OAM) through an anisotropy \emph{director}, a rank-two, headless field…
Geometry-Controlled Exceptional Points in Helicoidal Orbital-Angular-Momentum Photonics
Edilberto O. Silva
Exceptional points (EPs) are non-Hermitian spectral singularities where eigenvalues and eigenvectors coalesce. We propose a geometry-controlled route to EPs in orbital-angular-mome…
Structured-light propagation in a medium with uniform torsion: polarization textures, geometric birefringence, and beam-resolved optical activity
Edilberto O. Silva
We investigate finite-width optical-beam propagation in a medium with uniform torsion described by the geometric theory of a continuous distribution of screw dislocations. Starting…
Geometrical optical activity induced by a continuous distribution of screw dislocations
Humberto Belich, Edilberto O. Silva
We study light propagation in a medium with uniform torsion, modeled as a continuum of screw dislocations within the geometric theory of defects. By solving Maxwell's equations in…