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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Instrumentation and Methods for Micro- and Nanoanalysis (joint session KFM/CPP)

CPP 10.1: Talk

Monday, March 27, 2023, 14:30–14:50, POT 106

The Hitchhiker's Guide to BCARS on Solid-State Single Crystals — •Franz Hempel¹, Lukas König¹, Federico Vernuccio², Dario Polli², Giulio Cerullo², Michael Rüsing¹, and Lukas Matthias Eng^1,3 — ¹Institut für Angewandte Physik, TU Dresden, 01187 Dresden, Germany — ²Physics Department, Politecnico di Milano, 20133 Milano, Italy — ³ct.qmat: Dresden-Würzburg Cluster of Excellence - EXC 2147, TU Dresden, 01062 Dresden, Germany

Broadband coherent anti-Stokes Raman scattering (BCARS) is an advanced Raman- spectroscopy technique that offers high-speed hyperspectral imaging and is so far widely applied in the biomedical field. For crystalline materials and their high-precision analysis, however, additional aspects of phase-matching, scattering direction, and background removal delicately need to be taken into account. To prove the reproducibility of BCARS results and pinpoint setup-related influences, we have performed a comparison study using (a) two different setups, and (b) comparing transmission with epi-detection BCARS experiments. A broad set of solid-state crystalline materials with increasing complexity was analyzed, achieving comparable, background-free spectra. Also, each machine allows the specification of optimum laser and setup parameters for inspecting the different samples.