In this webinar hosted by the NonImaging Optical Design Technical Group, Mário Silveirinha will demonstrate that both the particle-hole symmetry and the dispersive nature of nonreciprocal photonic materials may lead to situations where the usual topological methods break-down and the Chern topology becomes ill-defined. Furthermore, Prof. Silveirinha will show how by exploiting ill-defined topologies it is possible to halt abruptly the wave propagation at a topological singularity that determines the transition between well-defined and ill-defined topologies. Prof. Silveirinha’s vision is that systems with ill-defined topologies may open new inroads in nanoplasmonics and have exciting applications in energy harvesting and in the enhancement of nonlinearities.

Subject Matter Level: Intermediate - Assumes basic knowledge of the topic

What You Will Learn:
• Topology
• Nonreciprocal Materials
• Nanophotonics

Who Should Attend:
• Students
• Early career scientists
• Professionals

About the Presenter: Mário G. Silveirinha from The University of Lisbon

Mário G. Silveirinha received the Licenciado degree in Electrical Engineering from the University of Coimbra, Coimbra, Portugal, in 1998, and the Ph.D. degree in Electrical and Computer Engineering (with a minor in Applied Mathematics) from the Instituto Superior Técnico (IST), Technical University of Lisbon, Lisbon, Portugal, in 2003. Currently, he is a Professor at the University of Lisbon, Portugal and a Senior Researcher at Instituto de Telecomunicações. Mário Silveirinha is an IEEE Fellow, and OSA Fellow and an APS Fellow. He is a member of the Academy of Sciences of Lisbon. He is a founding editor of the APS journal Physical Review Applied. He was a Visiting Professor at the University of Pennsylvania during several periods in 2004-2005 and 2010-2011, and a Chercheur CNRS en Physique at the University of Montpellier in 2017. His research interests include electromagnetism, plasmonics and metamaterials, quantum optics, and topological effects.