What is it about?
A simple and effective method to control the asymmetric spin splitting flexibly by introducing off-axis vortex beams is reported here. Unlike the conventional spin Hall effect of light, both the value and the sign of the right- and left-handed circularly polarized components can be manipulated individually by modulating the off-axis vortex’s position. Significantly, the in-plane shifts occur when the vortex position x0 is non-zero. In addition, it is found that this asymmetric splitting increases with increase in the topological charge. This flexibly adjustable asymmetric spin splitting provides the possibility to accelerate the development of nano-photonic devices.
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Why is it important?
Unlike the conventional spin Hall effect of light, we can individually manipulate both the value and the sign of the right- and left-handed circularly polarized components by modulating the off-axis vortex's position. Significantly, the in-plane shifts occur when the vortex position x0 is non-zero. This flexibly adjustable asymmetric spin splitting provides the possibility to accelerate the development of nano-photonic devices.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. This article is very interesting and exhibits an asymmetric spin Hall effect of light without changing the structure parameters.
Xiang Zhou
South China Normal University
Read the Original
This page is a summary of: Off‐Axis Vortex‐Induced Asymmetric Spin‐Dependent Splitting, Annalen der Physik, August 2022, Wiley, DOI: 10.1002/andp.202200236.
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