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Experimental observation of longer trajectories than previously observed in high-order harmonic generation

Bengtsson, S. LU orcid ; Simpson, E. R. LU ; Ibrakovic, N. LU ; Ek, S. LU ; Olofsson, A. LU ; Causer, T. and Mauritsson, J. LU orcid (2023) In Physical Review A 108(1).
Abstract

We experimentally observe longer than long trajectory influence in high-order harmonic generation (HHG) by varying the peak intensity of the driving laser field either through direct attenuation or by chirping the laser pulse. Using a theoretical Gaussian beam model to simulate spatial interference resulting from quantum path interference, we show that the measured interference patterns cannot be solely explained by the well-established short and long trajectories. The structure change is most prominent for the more divergent, off-axis components of the lower plateau harmonic region, affecting the direction and amplitude of the extreme ultraviolet light emitted, and is thus of importance for understanding and controlling the... (More)

We experimentally observe longer than long trajectory influence in high-order harmonic generation (HHG) by varying the peak intensity of the driving laser field either through direct attenuation or by chirping the laser pulse. Using a theoretical Gaussian beam model to simulate spatial interference resulting from quantum path interference, we show that the measured interference patterns cannot be solely explained by the well-established short and long trajectories. The structure change is most prominent for the more divergent, off-axis components of the lower plateau harmonic region, affecting the direction and amplitude of the extreme ultraviolet light emitted, and is thus of importance for understanding and controlling the fundamentals of the HHG process.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
108
issue
1
article number
013505
publisher
American Physical Society
external identifiers
  • scopus:85165644259
ISSN
2469-9926
DOI
10.1103/PhysRevA.108.013505
language
English
LU publication?
yes
id
cadc8926-786a-4941-b7d5-ac4c15215297
date added to LUP
2023-12-22 10:51:33
date last changed
2023-12-22 10:52:23
@article{cadc8926-786a-4941-b7d5-ac4c15215297,
  abstract     = {{<p>We experimentally observe longer than long trajectory influence in high-order harmonic generation (HHG) by varying the peak intensity of the driving laser field either through direct attenuation or by chirping the laser pulse. Using a theoretical Gaussian beam model to simulate spatial interference resulting from quantum path interference, we show that the measured interference patterns cannot be solely explained by the well-established short and long trajectories. The structure change is most prominent for the more divergent, off-axis components of the lower plateau harmonic region, affecting the direction and amplitude of the extreme ultraviolet light emitted, and is thus of importance for understanding and controlling the fundamentals of the HHG process.</p>}},
  author       = {{Bengtsson, S. and Simpson, E. R. and Ibrakovic, N. and Ek, S. and Olofsson, A. and Causer, T. and Mauritsson, J.}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Experimental observation of longer trajectories than previously observed in high-order harmonic generation}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.108.013505}},
  doi          = {{10.1103/PhysRevA.108.013505}},
  volume       = {{108}},
  year         = {{2023}},
}