2 papers
physics.optics2024
Both orbital and spin torques originate from r x g
Frances Crimin, Stephen M. Barnett
Does the cross-product of the position and the electromagnetic momentum density, g, include the optical spin momentum? We answer this long-standing question in the affirmative by e…
physics.optics2019
On the conservation of helicity in a chiral medium
Frances Crimin, Neel Mackinnon, Jörg B. Götte +1
We consider the energy and helicity densities of circularly polarised light within a lossless chiral medium, characterised by the chirality parameter . A form for the helicity d…