The angular momentum of twisted light in anisotropic media: chiroptical interactions in chiral and achiral materials

Forbes, Kayn A. and Andrews, David L. (2018) The angular momentum of twisted light in anisotropic media: chiroptical interactions in chiral and achiral materials. In: Proceedings of SPIE. SPIE Press.

[img]
Preview
PDF (Published manuscript) - Published Version
Download (405kB) | Preview

Abstract

The issue of whether the optical orbital angular momentum of light can play any significant role in chiroptical interactions has seen a resurgence of interest in the past few years. Revising preliminary expectations, it has been shown both theoretically and experimentally that the topological charge can indeed play a decisive role in some chiroptical interactions, with the rates of these optical phenomena proving sensitive to the sign of the vortex charge. Using quantum electro- dynamics, it is now revealed how the inclusion of molecular electric-quadrupole transition moments in both chiral and achiral anisotropic media produces such an effect. Specifically, for single-photon absorption it transpires that both the orbital and spin angular momentum must be engaged through a circularly polarized vortex beam. The chiroptical effect is identified as a manifestation spin-orbit interaction in light.

Item Type: Book Section
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Pure Connector
Date Deposited: 17 May 2018 10:30
Last Modified: 22 Apr 2020 11:15
URI: https://ueaeprints.uea.ac.uk/id/eprint/67108
DOI: 10.1117/12.2305723

Actions (login required)

View Item View Item