@inproceedings{09df35b6a6e2423abe9aa6827865515c,
title = "Topological dichroism and birefringence of twisted light",
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.",
keywords = "Structured light, anisotropic, birefringence, dichroism, light-matter interactions, optical angular momentum, polarization, topological charge",
author = "Kayn Forbes and Dale Green",
year = "2024",
month = jun,
day = "10",
doi = "10.1117/12.3017857",
language = "English",
volume = "12991",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
pages = "51--59",
editor = "Andrews, {David L.} and Bain, {Angus J.} and Antonio Ambrosio",
booktitle = "Nanophotonics X",
address = "United States",
}