SKM 2023 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 6: Poster
KFM 6.15: Poster
Dienstag, 28. März 2023, 17:00–19:00, P3
Comparison of Infrared and Raman active phonon modes in Lithium Niobate — •Soham Gharat1, Susanne Kehr1, Michael Rüsing1, and Lukas M Eng1,2 — 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
The isostructural crystal of Lithium niobate is among the most widely used single-crystalline ferroelectric crystal with applications ranging from nonlinear optics [1] and high-speed electro-optic modulators, to high-frequency electronic filters [2]. In this work, we investigate the Lithium niobate crystal using both Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR) [3]. We focus on consistently assigning the phonons in this material system using the two techniques in order to characterize and compare all these vibrational modes and their associated optical response. This work hence serves as a basis for the future study of nanoscopic features in this material, i.e. especially domain walls, by means of nano-FTIR and micro-Raman spectroscopy [4].
[1] D. Zhu et al., Adv. Opt. Phot. 12, 242 (2021); https://doi.org/10.1364/AOP.411024. [2] C. Wang et al., Nature 562, 101 (2018); https://doi.org/10.1038/s41586-018-0551-y. [3] S. Margueron et al., J. Appl. Phys 111,104105 (2012). https://doi.org/10.1063/1.4716001. [4] M. Rüsing et al., Phys. Rev. Mater. 2, 103801 (2018); https://doi.org/10.1103/PhysRevMaterials.2.103801.