Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session M12: Optics in 2D Materials: Part IV
8:00 AM–10:48 AM,
Wednesday, March 6, 2024
Room: M100C
Sponsoring
Unit:
FIAP
Chair: Ding Zhang, Rice University
Abstract: M12.00013 : Measurement of the complex valley polarization second order nonlinear susceptibility*
10:24 AM–10:36 AM
Presenter:
Paul Herrmann
(Friedrich Schiller University Jena)
Authors:
Paul Herrmann
(Friedrich Schiller University Jena)
Sebastian Klimmer
(Friedrich Schiller University Jena)
Till Weickhardt
(Friedrich Schiller University Jena)
Ioannis Paradisanos
(INSA/CNRS)
Zdeněk Sofer
(University of Chemistry and Technology Prague)
Daniil Kartashov
(Friedrich Schiller University Jena)
Giancarlo Soavi
(Friedrich Schiller University Jena)
We propose a new approach to detect the VP, based on measuring the total SHG intensity while tuning the excitation from linear to circular polarized. This method not only probes the disperion of the valley-induced susceptibility across the excitonic A1s resonance, but we also demonstrate the significance of interference between the electric-dipole (ED) and the valley-induced susceptibilities, in analogy with the magnetic-ED interference in bulk magnets [2].
[1] Herrmann, P. et al.: small 2023
[2] Fiebig, M. et al.: PRL 1994 73(2127)
*This work was funded by the German Research Foundation DFG (CRC 1375 NOA), project number 398816777 (subproject C4); the International Research Training Group (IRTG) 2675 "Meta-Active", project number 437527638 (subproject A4); and by the German Federal Ministry for Education and Research (BMBF) project number 16KIS1792 SINNER.
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