Topological dichroism and birefringence of twisted light

Kayn A. Forbes; Dale Green

doi:10.1117/12.3017857

10 June 2024 Topological dichroism and birefringence of twisted light

Kayn A. Forbes, Dale Green

Proceedings Volume 12991, Nanophotonics X; 129910C (2024) https://doi.org/10.1117/12.3017857
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Material anisotropy produces differential absorption and birefringence of linearly polarized light; material chirality leads to differential absorption and birefringence of circularly polarized light. Here we highlight how anisotropic media can produce a differential absorption and birefringence which depends on the sign of the topological charge ℓ of a focused optical vortex beam. Manifesting purely through electric-dipole interactions and proportional to the paraxial parameter to first order, these topological-charge-dependent light-matter interactions are significantly larger than current ℓ-dependent effects which require material chirality and extremely focused light. The interactions described within represent a novel method for probing the local structure of advanced materials and nanoscale light.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kayn A. Forbes and Dale Green "Topological dichroism and birefringence of twisted light", Proc. SPIE 12991, Nanophotonics X, 129910C (10 June 2024); https://doi.org/10.1117/12.3017857

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