Special CPM Seminar

opological photonics in synthetic frequency dimensions

Dali Cheng

Stanford University

The synthetic frequency dimension is a scalable and flexible platform to study nontrivial topologies in photonics. The frequency of photons in a resonator is considered as an extra degree of freedom, and modulations are incorporated to couple frequency modes and form lattice structures with nontrivial topologies. This presentation addresses some recent progress of topological photonics in synthetic frequency dimensions. Band structure measurements of a high-dimensional synthetic frequency lattice can be performed to reveal non-Hermitian topologies. The first demonstration of non-Abelian lattice gauge fields for photons will also be discussed.