www.polaritonics.org - Kravstov 09/03/2023

Probing and controlling excitons in 2D semiconductors under weak and strong light-matter coupling

Prof. Vasily Kravtsov,
ITMO University, St Petersburg, Russia

09/03/2023, 10:00 CET

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.

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.

Date & Location

The event will be taking place online on the 09th of March at 15:00 CET. Please join using this link.

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