Junio 21, 2024
10:00
Topological reactions of vortex rings in paraxial laser beams
Where and when
Date
Junio 21, 2024
10:00
Featured speakers
Zhamila Kulchukova
Department of Physics, Nazarbayev University, Kazakhstan
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Zhamila Kulchukova is a graduate student at the Department of Physics, Nazarbayev University, Kazakhstan. She received her BSc in Physics with Honors Thesis at Nazarbayev University, and was recently named as one of the Optica Women Scholars 2024 by the Optica Foundation. Zhamila’s main research area is singular optics and topological photonics; more specifically, she studies topological events associated with optical vortex rings.
Optical vortex rings are loop-like structures with a rotational flow of energy around the nodal lines. At the core of the vortex, the intensity vanishes to zero and the phase is undefined. We construct a model, which consists of the interference of the Gaussian beam and a 3D plane wave, that generates vortex rings. By breaking the symmetries in the transverse direction and along the axis of propagation, the rings can undergo various topological transformations, such as nucleation and reconnection. Our model can be replicated in a laboratory setting using accessible equipment, and has a potential to pinpoint specifics of the fundamental mechanisms that cause spontaneous knottings of vortices in non-linear systems.
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