Metasurfaces are artificial quasi-planar structures that can tailor light fields on demand. Their optical properties, however, are fixed upon fabrication, and a challenge is to find how to tune them externally. In the first part of the talk, I will review different approaches to tune optical properties of metasurfaces, including thermo-optic, electro-optic and all-optical ones, with applications in high-speed polarimetric devices and controllable ultrathin lens. In the second part, we will explore resonant semiconductor nanoparticles and metasurfaces as nonlinear frequency converters that have a potential to serve as ultrafast, nanoscale all-optical logic elements.
Maxim Shcherbakov completed his PhD from Lomonosov Moscow State University, Russia, and is now a postdoctoral associate at Cornell University with Prof. Gennady Shvets. Maxim has published over thirty experimental peer-reviewed papers on nonlinear nanophotonics, tunable metamaterials and ultrafast physics, and currently serves as a co-PI on a project "Tunable Dielectric Metasurfaces and Metalens for AR/VR Applications" funded by Samsung Electronics. He is a recipient of the SPIE and DAAD scholarships, and the highly competitive Moscow Government Young Investigator Award. He is an active reviewer (Nature Photonics, Nature Communications, Nano Letters and others), avid science communicator and a past or present mentor to more than twenty undergraduate and graduate students.