PicoSwitch: active X-Ray optics for hard X-Ray pulse shortening (Conference Presentation)

Mathias Sander; Daniel Schmidt; Peter Gaal

doi:10.1117/12.2633542

3 October 2022 PicoSwitch: active X-Ray optics for hard X-Ray pulse shortening (Conference Presentation)

Mathias Sander, Daniel Schmidt, Peter Gaal

Author Affiliations +

Proceedings Volume PC12240, Advances in X-Ray/EUV Optics and Components XVII; PC1224008 (2022) https://doi.org/10.1117/12.2633542
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

We report on recent developments of solid state based Active X-ray Optics, namely a device that functions as a photoacoustic hard x-ray switch. This so-called PicoSwitch requires a femtosecond laser pulse to trigger the propagation of coherent sound waves to alter the lattice parameter of a specifically designed switching layer in the device heterostructure. The PicoSwitch employs the subsequent angular shift of the diffraction efficiency to slice an impinging synchrotron x-ray pulse to less than 10 ps duration. A major part of the development was carried out at the time-resolved endstation (ID09) of the European Synchrotron Radiation Facility where it is available upon user request. In our contribution we discuss the main operation parameters such as efficiency and on-off switching contrast as well as strategies for improving the device performance even further. In short, the PicoSwitch delivers hard x-ray pulses with a duration of 5-10 ps which are inherently synchronized with the excitation laser. Despite the relatively low efficiency (≈10-3) the device can deliver up to 109 photons/sec when utilized at high repetition rates. In our presentation will discuss benchmark experiments performed at various beamlines, e.g., the investigation of ultrafast lattice dynamics in thin films and superlattices.

Conference Presentation

Citation Download Citation

Mathias Sander, Daniel Schmidt, and Peter Gaal "PicoSwitch: active X-Ray optics for hard X-Ray pulse shortening (Conference Presentation)", Proc. SPIE PC12240, Advances in X-Ray/EUV Optics and Components XVII, PC1224008 (3 October 2022); https://doi.org/10.1117/12.2633542

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KEYWORDS

Hard x-rays

X-ray optics

Photoacoustic spectroscopy

Picosecond phenomena

Solid state physics

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