Circular dichroism of cholesteric polymers and the orbital angular momentum of light
W. L\"offler, D. J. Broer, J. P. Woerdman
TL;DR
This study experimentally examines whether light's orbital angular momentum influences the circular dichroism of cholesteric polymers, finding no detectable effect within experimental accuracy, especially with non-paraxial light beams.
Contribution
First experimental investigation of OAM's effect on circular dichroism in cholesteric polymers, focusing on non-paraxial light interactions.
Findings
No influence of OAM on circular dichroism detected
Non-paraxial light beams do not alter dichroism within measurement accuracy
Experimental results suggest OAM does not couple with chiral nematic polymer optical properties
Abstract
We explore experimentally if the light's orbital angular momentum (OAM) interacts with chiral nematic polymer films. Specifically, we measure the circular dichroism of such a material using light beams with different OAM. We investigate the case of strongly focussed, non-paraxial light beams, where the spatial and polarization degrees of freedom are coupled. Within the experimental accuracy, we cannot find any influence of the OAM on the circular dichroism of the cholesteric polymer.
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