Dresden 2026 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 35: Optical Properties II
HL 35.1: Vortrag
Mittwoch, 11. März 2026, 16:30–16:45, POT/0251
Polarization-Angle-Resolved Raman Spectroscopy for Reliable Raman Tensor Analysis — •Hans Tornatzky1, Jonas Rose1, Luca Choi2, Moritz Meissner1, Zbigniew Galazka3, and Markus R. Wagner1,2 — 1Paul Drude Institut — 2Technische Universität Berlin — 3Institut für Kristallzüchtung
Phonons are fundamental to materials, shaping the physical properties that underlie device functionality. Accurate knowledge of their quantitative description, specifically the Raman tensor, is essential for a detailed understanding of materials and for reliable modeling and optimization of structures and devices.
This talk presents state-of-the-art approaches for determining relative Raman tensor elements using polarization-angle-resolved Raman (PARRS) spectroscopy, alongside discussion of major challenges and sources of error encountered in the process. We also introduce a newly developed fitting procedure that enables robust disentanglement of strongly overlapping signals arising from different modes, permitting precise extraction of their characteristics – energy, FWHM, symmetry, and tensor elements – with enhanced reproducibility.
These techniques are demonstrated across several materials recently studied by our group, including rutile GeO2, Ga2O3, and LaInO3.
Keywords: Raman; LaInO3; GeO2; Ga2O3