On the 9th of March 2023, as part of Polaritonics Seminar Series, we will have Dr. Vasily Kravtsov, Leading research fellow Faculty of Physics, ITMO University talking on the point of “Probing and controlling excitons in 2D semiconductors under weak and strong light-matter coupling”.
When: On the 9th of March 2023, Thursday, at 17:00 MSK time
Where: New Campus room E-R3-2007 / BigBlueButton
About the speaker:
Vasily Kravtsov has graduated from M. V. Lomonosov Moscow State University (Russia) and received a PhD degree in Physics from University of Colorado at Boulder (USA) in 2017. He has worked as a research assistant at the Physics Department of CU Boulder and Joint Institute for Laboratory Astrophysics (JILA), focusing on experimental research in near-field optics, nanotechnology, and femtosecond laser pulses. In 2018 Vasily joined ITMO University (Saint Petersburg, Russia) as a leading research fellow. Currently, Vasily is an assistant professor and group leader at the School of Physics and Engineering, ITMO University. His research interests include two-dimensional quantum materials, ultrafast spectroscopy, and nonlinear nano-optics. 
Abstract:
Atomically thin transition metal dichalcogenides (TMDs) are direct band gap semiconductors that host excitons with large binding energies and sizeable exciton-exciton interaction strength. As these excitons can strongly couple to optical fields in nanophotonic structures, TMDs provide a promising material platform for developing compact room-temperature nonlinear polaritonic devices. On the other hand, weak coupling to optical fields provides a powerful tool for studying and controlling nanoscale exciton physics in TMD monolayers and heterostructures. In this talk, I will discuss our recent results on probing and controlling excitons in TMD-based systems in the weak and strong light-matter coupling regimes. In the strong coupling regime, we study nonlinear propagation of polariton pulses in TMD-based nanophotonic waveguides. In the weak coupling regime, we probe and control intra- and inter-layer excitons in TMD heterostructures. If time permits, I will also discuss our recent results on single-photon emission in locally strained TMD monolayers.