Non-Hermiticity in optical microcavities

Jan Wiersig
Otto-von-Guericke-Universität Magdeburg Universitätsplatz 2, D-39106 Magdeburg, Germany
We discuss two aspects of non-Hermiticity in optical microcavities. First, we theoretically demonstrate third-order exceptional points in whispering-gallery cavities. Second, we reveal the role of mode nonorthogonality in the dynamics of waves propagating in open systems with localized losses.