https://doi.org/10.1051/epjconf/201920505011
Lightwave control of the valley pseudospin in a monolayer of tungsten diselenide
1 University of Regensburg, 93040 Regensburg, Germany
2 University of Marburg, 35032 Marburg, Germany
3 University of Michigan, Ann Arbor, Michigan 48109, USA
* Corresponding author: christoph3.schmid@ur.de
Published online: 16 April 2019
As conventional electronic is approaching its ultimate limits, tremendous efforts have been taken to explore novel concepts of ultrafast quantum control. Lightwave electronics - the foundation of attosecond science - has opened a spectacular perspective by utilizing the oscillating carrier wave of an intense light pulse to control the translational motion of the electron’s charge faster than a single cycle of light [1-7]. Despite their promising potential as future information carriers [8,10], the internal quantum attributes such as spins and valley pseudospins have not been switchable at optical clock rates. Here we demonstrate a novel subcycle control scheme of the electron’s pseudospin in a monolayer of tungsten diselenide using strong mid-infrared lightwaves [9]. Our work opens the door towards systematic valleytronic protocols at optical clock rates.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
