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Topological Photonics

Topological Photonics
  • Chiral and Topological Photonics
  • Functionalization of Topological Materials
  • Fundamental Aspects of Quantum
  • Topological States of Light
  • Neuromorphic Photonics
  • Photonic Topological Insulators
  • Topology Concepts in Optics
  • Topological Effects in 2D Systems
  • Topological light Sources
  • Towards applications in Photonics
  • Topological Metamaterials and Functional Nanostructures
  • Novel Topological Photonic Materials

Topological Photonics

This is a quickly emerging field of research in which geometrical and topological ideas are exploited to project and control the behavior of light. Drawing inspiration from the discovery of the quantum hall effects and topological insulators in condensed matter, recent advances have shown how to engineer analogous effects also for photons, leading to remarkable phenomena like the robust unidirectional propagation of light, which hold great promise for applications.

Topological Invariants 

A topological invariant is a quantity that's unaffected by continuous deformations of the object. For example, a closed 2D surface of any finite 3D object are often characterized by the genus g, which counts the number of holes in the object. Thus, a sphere has a genus of g = 0, and a torus has a genus of g = 1; these two objects cannot transform continuously into each other: Any transformation from a sphere to a torus necessarily involves some discontinuity at which a hole is created; such topological phase transitions are accompanied by a stepwise (quantized) change in a topological invariant.

Under certain conditions, topological invariants are often utilized to describe band structures of periodic crystalline materials. In this context, continuous transformations are those that preserve all symmetries of the system and don't close the bandgap, and a topological phase change requires the bandgap to shut and re-open.

Boundaries between two materials characterized by distinct topological invariants necessarily host special gapless states localized to the boundary.

Committee Members
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Ephraim Suhir

Ephraim Suhir

Portland State University, United States
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Alex A Kazemi

Alex A Kazemi

The Boeing Company, United States
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Ben Campbell Biezanek

Ben Campbell Biezanek

Distinguished Researcher, United Kingdom
ELOS 2025 Speakers
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Luis E Abad

Luis E Abad

Admira Vision, Spain
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Vladimir G Chigrinov

Vladimir G Chigrinov

Hong Kong University of Science and Technology, Hong Kong
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Francisco Bulnes

Francisco Bulnes

IINAMEI, Mexico
Speaker at European Lasers, Photonics and Optics Technologies Summit  2025 - Asaad A Ghanem

Asaad A Ghanem

Mansoura University, Egypt
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