TRR 142 - Polaron signatures in the optical response of lithium niobate (B07*)


This joint theory-experiment project will explore the rich physics of polarons and their optical signatures. In particular, we plan to resolve their influence on the linear and nonlinear optical properties of the material as well as their condensation, hopping and dissociation characteristics in interaction with intrinsic and extrinsic point defects within the crystal. We focus on stoichiometric, congruent and differently doped lithium niobate. Our project shall contribute to a thorough understanding of polarons and the knowledge-driven optimization of the materials properties.

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Research profile area:
Optoelectronics and Photonics
Project type:
Project duration:
01/2022 - 12/2025

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Principal Investigators

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Prof. Dr. Wolf Gero Schmidt

Faculty of Science

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Dr. Christof Eigner

Institute for Photonic Quantum Systems (PhoQS)

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Prof. Dr. Tim Bartley

Mesoscopic Quantum Optics

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Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family
S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).
Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response
F. Schmidt, A.L. Kozub, U. Gerstmann, W.G. Schmidt, A. Schindlmayr, in: G. Corradi, L. Kovács (Eds.), New Trends in Lithium Niobate: From Bulk to Nanocrystals, MDPI, Basel, 2022, pp. 231–248.
Bound polaron formation in lithium niobate from ab initio molecular dynamics
M. Krenz, U. Gerstmann, W.G. Schmidt, Applied Physics A 128 (2022) 480.
DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking
L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, C. Eigner, Crystals 12 (2022) 1359.
Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4
S. Neufeld, A. Schindlmayr, W.G. Schmidt, Journal of Physics: Materials 5 (2022).
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