Experimental observation of trajectories beyond the long in high order harmonic generation

Experimental observation of trajectories beyond the long in high order harmonic generation

We experimentally observe longer than long trajectory influence in high order harmonic generation (HHG) by varying the peak intensity of the driving laser field through either direct attenuation, or by chirping the laser pulse. Using a theoretical Gaussian beam model to simulate spatial interference...

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Veröffentlicht in:arXiv.org 2022-12
Hauptverfasser: Bengtsson, S, Simpson, E R, Ibrakovic, N, S Ek, Olofsson, A, Causer, T, Mauritsson, J
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Gaussian beams (optics)
Harmonic generations
Interference
Ultraviolet radiation
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creator Bengtsson, S
Simpson, E R
Ibrakovic, N
S Ek
Olofsson, A
Causer, T
Mauritsson, J
description We experimentally observe longer than long trajectory influence in high order harmonic generation (HHG) by varying the peak intensity of the driving laser field through either 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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subjects Gaussian beams (optics)
Harmonic generations
Interference
Ultraviolet radiation
title Experimental observation of trajectories beyond the long in high order harmonic generation
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