Realization of all-optical vortex switching in exciton-polariton condensates

Xuekai Ma (), Bernd Berger, Marc Aßmann, Rodislav Driben, Torsten Meier, Christian Schneider, Sven Höfling and Stefan Schumacher
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Xuekai Ma: Universität Paderborn
Bernd Berger: Experimentelle Physik 2, Technische Universität Dortmund
Marc Aßmann: Experimentelle Physik 2, Technische Universität Dortmund
Rodislav Driben: Universität Paderborn
Torsten Meier: Universität Paderborn
Christian Schneider: Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg
Sven Höfling: Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg
Stefan Schumacher: Universität Paderborn

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Vortices are topological objects representing the circular motion of a fluid. With their additional degree of freedom, the vorticity, they have been widely investigated in many physical systems and different materials for fundamental interest and for applications in data storage and information processing. Vortices have also been observed in non-equilibrium exciton-polariton condensates in planar semiconductor microcavities. There they appear spontaneously or can be created and pinned in space using ring-shaped optical excitation profiles. However, using the vortex state for information processing not only requires creation of a vortex but also efficient control over the vortex after its creation. Here we demonstrate a simple approach to control and switch a localized polariton vortex between opposite states. In our scheme, both the optical control of vorticity and its detection through the orbital angular momentum of the emitted light are implemented in a robust and practical manner.

Date: 2020
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DOI: 10.1038/s41467-020-14702-5

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