Topological-charge-dependent dichroism and birefringence of optical vortices
arXiv:2401.11992 · doi:10.1002/lpor.202400109
Abstract
Material anisotropy and chirality produce polarization-dependent light-matter interactions. Absorption leads to linear and circular dichroism, whereas elastic forward scattering produces linear and circular birefringence. Here we highlight a form of dichroism and birefringence whereby ordered generic media display locally different absorption and scattering of a focused vortex beam that depends upon the sign of the topological charge . The light-matter interactions described in this work manifest purely through dominant electric-dipole coupling mechanisms and depend on the paraxial parameter to first-order. Previous topological-charge-dependent light-matter interactions required the significantly weaker higher-order multipole moments and are proportional to the paraxial parameter to second-order. The result represents a method of probing the nano-optics of advanced materials and the topological properties of structured light.
References in corpus (6)
- Optical vortex dichroism in chiral particles
- Geometric descriptions for the polarization for nonparaxial optical fields: a tutorial
- Relevance of Longitudinal Fields of Paraxial Optical Vortices
- Optical helicity of unpolarized light
- Customized optical chirality of vortex structured light through state and degree of polarization control
- Discrimination of Chiral and Helical Contributions to Raman Scattering of Liquid Crystals using Vortex Beams