Nondiffracting supertoroidal pulses and optical "Kármán vortex streets"

Area of Science:

• Electromagnetism
• Wave physics
• Nonlinear optics

Background:

• Supertoroidal light pulses possess unique topological properties like skyrmionic configurations.
• These properties, including energy backflow and fractal singularities, are typically lost during propagation in free space.

Purpose of the Study:

• To introduce non-diffracting supertoroidal pulses (NDSTPs) that maintain their structural integrity over long distances.
• To investigate the propagation-robust topological features of these novel light pulses.

Main Methods:

• Theoretical modeling and analysis of supertoroidal light pulse propagation.
• Investigating the field structure and topological properties of NDSTPs.

Main Results:

• NDSTPs exhibit propagation-robust skyrmionic and vortex field configurations.
• The field structure of NDSTPs resembles the von Kármán vortex street, characterized by stable, staggered singularities.
• These pulses maintain their structure over arbitrary propagation distances.

Conclusions:

• NDSTPs overcome the propagation limitations of conventional supertoroidal pulses.
• The stable, structured nature of NDSTPs makes them promising for applications in directed information and energy transfer.