Excitons in twisted van der Waals bilayers: Internal structure and ultrafast dynamics
Journal
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Journal Volume
2020-November
ISBN
9781728166209
Date Issued
2020-11-08
Author(s)
Mooshammer, Fabian
Merkl, Philipp
Ovesen, Simon
Brem, Samuel
Girnghuber, Anna
Lin, Kai Qiang
Liebich, Marlene
Gillen, Rolang
Maultzsch, Janina
Lupton, John M.
Malic, Ermin
Huber, Rupert
Abstract
By probing internal 1s-2p transitions with phase-locked mid-infrared pulses, we reveal the internal structure and binding energy of photo-generated excitons in transition metal dichalcogenide bilayers. Furthermore, we trace how the twist angle precisely controls the ultrafast formation of interlayer excitons and tunes excitonic hybridization in hetero- and homobilayers, respectively.
SDGs
Type
conference paper