Optically tunable topological photonic structures

The nominee was an invited speaker for the 2020 March meeting but had their talk canceled. I am resubmitting the nomination so it can be considered for the 2021 meeting. Their 2020 abstract is below:
Photonic topological insulators offer the possibility to eliminate backscattering losses and improve the efficiency of optical communication systems. We combine the properties of a planar silicon photonic crystal and the concept of topological protection to demonstrate dynamically controlled transmission in a topological photonic crystal that exhibits the valley Hall effect.