Related Experiment Video
Updated: Apr 30, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
X-ray second harmonic generation
S Shwartz1, M Fuchs2, J B Hastings3
1Physics Department and Institute of Nanotechnology, Bar Ilan University, Ramat Gan 52900, Israel and Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Abstract:
We report clear experimental evidence for second harmonic generation at hard x-ray wavelengths. Using a 1.7 Å pumping beam generated by a free electron laser, we observe second harmonic generation in diamond. The generated second harmonic is of order 10 times the background radiation, scales quadratically with pump pulse energy, and is generated over a narrow phase-matching condition. Of importance for future experiments, our results indicate that it is possible to observe nonlinear x-ray processes in crystals at pump intensities exceeding 1016 W/cm2.
Related Concept Videos
X-ray Imaging
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Generating Electromagnetic Radiations
X-ray Crystallography
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

