Creator/Principal investigator(s)
Sara Mikaelsson
Yu-Chen Cheng
- Faculty of Engineering, LTH, Department of Physics
Mathieu Gisselbrecht - Faculty of Engineering, LTH, Department of Physics
Anne L'Huillier - Faculty of Engineering, LTH, Department of Physics
Cord L Arnold - Faculty of Engineering, LTH, Department of Physics
Description
We study photoemission, the process where electromagnetic radiation interacts with matter and leads to the emission of electrons. This process takes place on an incredibly short time scale, but with the aid of advanced laser technology we can study its dynamics and the quantum mechanical rules that govern it. Here, we study the photoionization of helium with a 3D momentum spectrometer.
A short train of pulses in the extreme ultraviolet spectral regime and with an attosecond time duration were focused together with a few-cycle near infrared laser pulse into a helium gas jet in a spectrometer. The spectrometer measures both the resulting photoions and photoelectrons after the ionization by the combined extreme ultraviolet and infrared light, and the complete three-dimensional momentum distribution can be reconstructed.
In this study the photoelectron distribution was studied while varying the carrier-to-envelope phase (CEP) of the infrared field. The CEP is the phase relation between the envelope of a light pulse and its carrier wave, and for few cycle pulses it significantly alters the shap
Language
English
Research principal
Responsible department/unit
Department of Physics
Contributor(s)
Lisa Rämisch - Faculty of Engineering, LTH, Department of Physics
Saikat Nandi - Faculty of Engineering, LTH, Department of Physics
Miguel Miranda - Faculty of Engineering, LTH, Department of Physics
Jan Vogelsang - Faculty of Engineering, LTH, Department of Physics
Anne Harth - Faculty of Engineering, LTH, Department of Physics
... Show more..Research area
SCIENCE AND TECHNOLOGY
(CESSDA Topic Classification)
Physical Sciences, Atom and Molecular Physics and Optics
(The Swedish standard of fields of research 2011)
Cheng et al, Controlling the Photoelectric Effect in the Time Domain, arXiv:1908.09508
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Description
Data has been aquried with a 3D momentum spectrometer, recording position and time-of-flight of photo-electrons and photo-ions in coincidence. For more information about the operation of the spectrometer and methods for retriving momenta see:
M Gisselbrecht, A Huetz, M Lavollée, TJ Reddish, DP Seccombe, Optimization of momentum imaging systems using electric and magnetic fields. Rev. Sci. Instrum. 76, 013105 (2005).
Both measurements were been acquired with an extracting electric field of 84 V
Version 1.0
https://doi.org/10.5878/dc7g-n289
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Data format / data structure
Numeric
Creator/Principal investigator(s)
Sara Mikaelsson