Title:Â Â Exploring exciton nonlinearity and condensates in two-dimensional semiconductors
Abstract: Van der Waals heterostructures composed of atomically thin semiconductors have recently emerged as a platform for studying strongly interacting electronic and excitonic systems. In this talk, I will discuss a few ongoing experiments aimed at probing and controlling their excitonic phases. One focus is the exploration of exciton condensates, where we realize long-lived excitons with large binding energies and low disorder—critical factors for realizing high- temperature condensates. Furthermore, I will highlight how exciton-carrier interactions can create a strong nonlinear optical response, potentially enabling nonlinearity at low photon numbers. Finally, I will present our efforts to manipulate excitons and electrons via imprinting optical lattices at a deep subwavelength scale, providing new avenues for dynamically controlling excitonic and electronic behaviors.
*You will need to bring your cell phone, so you can sign in using the QR code outside of ATL 2400. You will need to submit your first and last name, email, and affiliation on a form by 11:15am to be able to get lunch after the seminar. Lunch is first come, first served.*