Projects per year
Abstract
Floquet engineering provides an optical means to manipulate electronic bandstructures, however, carriers excited by the pump field can lead to an effective heating, and can obscure measurement of the band changes. Here, we use multidimensional coherent spectroscopy to create a coherent ensemble of excitons in monolayer WS2 and measure the evolution of the coherence throughout the duration of the Floquet pump pulses with constant fluence but varying pulse duration. Changes to the amplitude of the macroscopic coherence quantifies the additional broadening introduced by interactions with carriers excited via two-photon absorption of the red-detuned pump. At the same time, the evolution of the average phase allows the instantaneous changes to the bandstructure to be quantified, which is demonstrated to be independent of the additional broadening. This approach to measuring the evolution of Floquet-Bloch states demonstrates a means to quantify effective heating and nonadiabaticity caused by excited carriers, while at the same time resolving the coherent evolution of the bandstructure.
Original language | English |
---|---|
Article number | 104302 |
Number of pages | 7 |
Journal | Physical Review B |
Volume | 109 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Mar 2024 |
Projects
- 2 Finished
-
Tuning electronic and optical properties in twisted 2D semiconductors
Fuhrer, M., Edmonds, M., Adam, S. & Rotenberg, E.
26/10/20 → 26/10/24
Project: Research
-
ARC Centre of Excellence in Future Low-energy Electronics Technologies
Fuhrer, M., Bao, Q., Culcer, D., Davis, M., Davis, J. A., Hamilton, A., Helmerson, K., Klochan, O., Medhekar, N., Ostrovskaya, E. A., Parish, M., Schiffrin, A., Seidel, J., Sushkov, O., Valanoor, N., Wang, X., Galitskiy, V., Gurarie, V., Hannon, J., Höfling, S., Hone, J., Rule, K. C., Krausz, F., Littlewood, P., MacDonald, A., Neto, A., Oezyilmaz, B., Paglione, J., Phillips, W., Spielman, I., Tadich, A., Xue, Q., Cole, J., Perali, A., Neilson, D., Sek, G., Gaston, N., Hodgkiss, J. M., Tang, M., Karel, J., Nguyen, T., Adam, S., Granville, S., Kumar, P. & Daeneke, T.
Australian Research Council (ARC), Monash University – Internal School Contribution, Monash University – Internal Department Contribution, Monash University – Internal Faculty Contribution, Monash University – Internal University Contribution, University of Wollongong, University of Queensland , Tsinghua University, University of New South Wales (UNSW), Australian National University (ANU), RMIT University, Swinburne University of Technology
29/06/17 → 28/06/24
Project: Research