Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: XUV/X-ray Science

A 27.2: Vortrag

Mittwoch, 7. März 2018, 14:15–14:30, K 1.011

Angle-resolved observation of X-ray second harmonic generation in diamond — •Björn Senfftleben¹, Priyanka Chakraborti¹, Brendan Kettle^1,2, Dilling Zhu³, Takahiro Sato³, Silke Nelson³, Samuel Teitelbaum⁴, Phillip H. Bucksbaum⁴, Jerome B. Hastings⁴, Sharon Shwartz⁵, David A. Reis⁴, and Matthias Fuchs^1,4 — ¹University of Nebraska-Lincoln, Lincoln, NE, USA — ²Imperial College, London, UK — ³Linac Coherent Light Source, Menlo Park, CA, USA — ⁴Stanford Pulse Institute, Menlo Park, CA, USA — ⁵Bar-Ilan University, Ramat Gan, Israel

For a long time, the limited X-ray intensity of classical light sources have restricted experimental investigations of non-linear effects in the X-ray regime. With the advent of X-ray free-electron lasers (XFELs), it has become possible to explore new parameter spaces and to study X-ray matter interactions in the nonlinear regime. First experiments have tested the limits of current theoretical models.

Here we report the observation of angularly-resolved X-ray second harmonic generation (XSHG) in diamond at several phase-matching geometries. The quadratic dependence of the number of generated second harmonic photons on the incident pulse energy was verified. Further, the angular dependence of the efficiency and the rocking curve widths of the process were investigated. A good agreement with the theory has been found.