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Photonic Topological Mode Bound to a Vortex.

Adrian J Menssen1, Jun Guan2, David Felce1

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Researchers observed a topological defect mode in a 2D photonic material, analogous to graphene. This midgap mode, related to Majorana bound states, provides the first experimental proof of the Jackiw-Rossi model.

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Area of Science:

  • Condensed matter physics
  • Topological photonics
  • Materials science

Background:

  • Topological defects in materials can host exotic phenomena.
  • Photonic materials offer a platform to study condensed matter physics concepts.
  • The Jackiw-Rossi model predicts specific phenomena in superconducting vortices.

Purpose of the Study:

  • To experimentally observe and characterize a mode associated with a topological defect in a 2D photonic material.
  • To investigate the relationship between these modes and Majorana bound states.
  • To provide the first experimental demonstration of the Jackiw-Rossi model.

Main Methods:

  • Fabrication of a 2D photonic material with a hexagonal lattice structure.
  • Introduction of a vortex distortion to the lattice.
  • Optical measurements to observe midgap energy modes.

Main Results:

  • Observation of a midgap mode at zero energy associated with a topological defect.
  • The observed mode is closely related to Majorana bound states in superconducting vortices.
  • Successful experimental demonstration of the Jackiw-Rossi model.

Conclusions:

  • Topological defects in 2D photonic materials can host unique midgap modes.
  • These modes have implications for understanding Majorana bound states.
  • The study validates the Jackiw-Rossi model through experimental observation.