EE Distinguished Speakers Seminar: Exciton Manipulation in 2D TMDC Heterostructures
Event details
| Date | 22.03.2019 |
| Hour | 13:15 › 14:15 |
| Speaker | Andras Kis, Professor in Electrical Engineering at EPFL, Lausanne. Andras Kis started research on 2D semiconductors in 2008, after joining EPFL and has made fundamental contributions to the study of the electronic properties of atomically thin TMDCs. His pioneering work on MoS2 transistors was the first demonstration of high-quality device on a 2D semiconductor. Andras Kis is also serving as the editor in chief of the Nature partner journal 2D materials and applications. |
| Location | |
| Category | Conferences - Seminars |
Abstract: The discovery of graphene marked the start of research in 2D electronic materials which was expanded in new directions with MoS2 and other layered semiconducting materials. They have a wide range of interesting fundamental properties and potential applications. New opportunities are enabled by the band structure of transition metal dichalcogenides (TMDCs) in which we could harness the valley degree of freedom for valleytronics and next-generation photonics. Long-lived interlayer excitons in van der Waals heterostructures based on TMDCs have recently emerged as a promising platform for this, allowing control over exciton diffusion length, energy and polarisation. I will show here how by using MoS2/WSe2 van der Waals heterostructures, we can realize excitonic transistors with switching action, confinement and control over diffusion length at room temperature in a reconfigurable potential landscape. Heterostructures with a long-range moiré potential such as in MoSe2/WSe2, on the other hand, offer the way to control polarization, emission and wavelength emitted by different optically active regions in the moiré.
Practical information
- General public
- Free
Organizer
- Prof. Elison Matioli