Lightwave Driven Valleytronic Qubit Flip
Markus Borsch, Benjamin Girodias, J. T. Steiner, S. W. Koch, Christoph P. Schmid, S. Schlauderer, Fabian Langer, R. Huber, M. Kira · Conference on Lasers and Electro-Optics · 2019
We demonstrate a flip of the valley pseudo-spin in a tungsten-diselenide monolayer on a sub-5fs timescale using strong terahertz fields. The resulting sideband emission reveals Coulombic many-body effects.