Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 20: Poster I
HL 20.31: Poster
Dienstag, 10. März 2026, 18:00–20:00, P1
SH modulation in a TMD-graphene heterostructure — •Raja Hoffmann1, Lisa Suchomel1, Omid Ghaebi1, Till Weickhardt1, and Giancarlo Soavi1,2 — 1Friedrich-Schiller-Universität Jena, Germany — 2Abbe Center of Photonics, Jena, Germany
One of the most fascinating properties of layered materials is arguably the possibility to combine them in heterostructures with engineered electronic and optical properties. In the field of nonlinear optics, a clear example is the emergence of second harmonic generation (SHG) in layered heterostructures realized by combining centrosymmetric materials. In such samples, interface broken space inversion symmetry can be engineered in different ways depending on the choice of materials and twist angle. An interesting example, which has been investigated recently in Ref.[1], are heterostructures composed of bilayer TMDs and monolayer graphene. As charges move from the TMD into the graphene, an imbalance between the bottom and top layers in the TMD bilayer leads to breaking of the inversion symmetry.
Building on these previous seminal results, we further investigate a bilayer TMD-monolayer graphene gated device, focusing in particular on both gate and all-optical tuneability of its engineered SHG. With this, we aim to add another prototype sample to the growing list of nonlinear nanophotonic devices based on layered materials and displaying ultrafast tunable optical properties [2,3].
[1] Zhang et al. Science Advances 9, 4571 (2023).
[2] Ghaebi et al. Advanced Science 11, 2401840 (2018).
[3] Klimmer et al. Nature Photonics 15, 837-842 (2021).
Keywords: TMD; Graphene; nonlinear optics