Terahertz-pump experiments on complex solids at x-ray FELs

Matthias C. Hoffmann; Michael E. Kozina

doi:10.1117/12.2322169

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14 September 2018 Terahertz-pump experiments on complex solids at x-ray FELs

Matthias C. Hoffmann, Michael E. Kozina

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Proceedings Volume 10756, Terahertz Emitters, Receivers, and Applications IX; 107560D (2018) https://doi.org/10.1117/12.2322169
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

We present recent progress in understanding nonlinear phonon dynamics driven by intense THz field strengths using ultrafast x-ray diffraction. This technique allows us to characterize the motion of the atomic lattice inside the sample on a sub-cycle timescale while the driving field is still present. In the example of strontium titanate (SrTiO₃) we observe harmonic generation and phonon upconversion when the fundamental soft mode is driven into the nonlinear regime by a single-cycle THz pulse.

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Matthias C. Hoffmann and Michael E. Kozina "Terahertz-pump experiments on complex solids at x-ray FELs", Proc. SPIE 10756, Terahertz Emitters, Receivers, and Applications IX, 107560D (14 September 2018); https://doi.org/10.1117/12.2322169

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