SKM 2023 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Poster

KFM 6.35: Poster

Dienstag, 28. März 2023, 17:00–19:00, P3

High-speed domain wall imaging using broadband coherent anti-Stokes Raman scattering — •Robin Buschbeck¹, Franz Hempel¹, Sven Reitzig¹, Julius Ratzenberger¹, Lukas König¹, Peter Andrew Hegarty¹, Zeeshan Hussain Amber¹, Michael Rüsing¹, and Lukas Eng^1,2 — ¹Institut für Angewandte Physik, TU Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany — ²ct.qmat: Dresden-Würzburg Cluster of Excellence - EXC 2147, TU Dresden, 01062 Dresden, Germany

Spontaneous Raman spectroscopy (SR) is a broadly used and versatile method for the analysis of structures in crystalline materials, such as strain distributions or ferroelectric domain walls. A large disadvantage of this technique are the high acquisition times of up to several seconds per data point to visualize these structures. In this work, we demonstrate the use of a promising alternative, broadband coherent anti-Stokes Raman scattering (B-CARS) and compare this technique with SR at the example of poled Lithium niobate. We demonstrate a more than resulting in a 100 times higher signal-to noise ratio, while maintaining similar intensities. These results promise the use of B-CARS for high-speed spectral imaging in the context of solid-state materials, such as ferroelectrics and their domain walls.