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HL: Fachverband Halbleiterphysik

HL 2: 2D Semiconductors and van der Waals Heterostructures I

Montag, 17. März 2025, 09:30–13:00, H15

The session covers the photonic properties and corresponding devices made from 2D semiconductors and van der Waals heterostructures.

09:30	HL 2.1	Probing strong electron-phonon coupling in graphene by resonance Raman spectroscopy with infrared excitation energy — •Simone Sotgiu, Tommaso Venanzi, Lorenzo Graziotto, Francesco Macheda, Taoufiq Ouaj, Elena Stellino, Bernd Beschoten, Christoph Stampfer, Francesco Mauri, and Leonetta Baldassarre

09:45	HL 2.2	Nonlinear Probing of Ultrafast Bandgap Modulations in Atomically Thin Semiconductors — •Sebastian Klimmer, Thomas Lettau, Jan Wilhelm, Dragomir Neshev, and Giancarlo Soavi

10:00	HL 2.3	Detecting out-of-plane polarized luminescence in TMDs with laser-written waveguide circuits — •Alina Schubert, Karo Becker, Rico Schwartz, Andreas Thies, Alexander Szameit, Matthias Heinrich, and Tobias Korn

10:15	HL 2.4	Current-induced second-harmonic generation in monolayer graphene-devices — •Nele Tornow, Friederike Renz-Wieland, Omid Ghaebi, and Giancarlo Soavi

10:30	HL 2.5	Electron-phonon coupling across the TMD/hBN van der Waals interface — •Gianmarco Gatti, Christophe Berthod, Julia Issing, Michael Straub, Salony Mandloi, Yann Alexaniann, Anna Tamai, and Felix Baumberger

10:45	HL 2.6	Polaron spectroscopy of many-body systems — •Ivan Amelio

11:00		15 min. break

11:15	HL 2.7	Ultrafast All-Optical Probe of Broken Time-Reversal Symmetry in Monolayer WSe₂ — •Paul Herrmann, Sebastian Klimmer, Thomas Lettau, Till Weickhardt, Anastasios Papavasileiou, Kseniia Mosina, Zdeněk Sofer, Jan Wilhelm, and Giancarlo Soavi

11:30	HL 2.8	Layer number sensitive Raman modes of atomically thin layered MoS₂ — •Henry Hübschmann, Gerhard Berth, Klaus Jöns, Katharina Burgholzer, and Alberta Bonanni

11:45	HL 2.9	Universal and ultrafast probe of broken time-reversal symmetry — •Florentine Friedrich, Paul Herrmann, Sebastian Klimmer, Zdeněk Sofer, Shridhar Sanjay Shanbhag, Jan Wilhelm, and Giancarlo Soavi

12:00	HL 2.10	Ultrafast pump-probe spectroscopy of WSe2 multilayer bubbles — •Jens-Christian Drawer, Henri Melchert, Marti Struve, Christian Schneider, and Martin Esmann

12:15	HL 2.11	Polarized optical contrast spectroscopy of in-plane anisotropic van-der-Waals heterostructures — Ernst Knöckl, •Alexandre Bernard, Alexander Holleitner, and Christoph Kastl

12:30	HL 2.12	Microscopic comparison of TMD and QW laser capabilities — •Tommy Schulz, Daniel Erben, Alexander Steinhoff, and Frank Jahnke

12:45	HL 2.13	Strong coupling between light confined in a dielectric nanocavity and excitons in a monolayer TMDC — •Frederik Schröder, Paweł Wyborski, Meng Xiong, George Kountouris, Battulga Munkhbat, Martijn Wubs, Philip T. Kristensen, Jesper Mørk, and Nicolas Stenger