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Spatially and spectrally resolved quantum path interference with chirped driving pulses

Carlström, Stefanos LU ; Preclíková, Jana; Lorek, Eleonora LU ; Larsen, Esben Witting LU ; Heyl, Christoph Michael LU ; Palecek, David LU ; Zigmantas, Donatas LU ; Schafer, Kenneth Joseph LU ; Gaarde, Mette B LU and Mauritsson, Johan LU (2016) In New Journal of Physics 18(12).
Abstract
We measure spectrally and spatially resolved high-order harmonics generated in argon using chirped multi-cycle laser pulses. Using a stable, high-repetition rate laser we observe detailed interference structures in the far-field. The structures are of two kinds; off-axis interference from the long trajectory only and on-axis interference including the short and long trajectories. The former is readily visible in the far-field spectrum, modulating both the spectral and spatial profile. To access the latter, we vary the chirp of the fundamental, imparting different phases on the different trajectories, thereby changing their relative phase. Using this method together with an analytical model, we are able to explain the on-axis behaviour and... (More)
We measure spectrally and spatially resolved high-order harmonics generated in argon using chirped multi-cycle laser pulses. Using a stable, high-repetition rate laser we observe detailed interference structures in the far-field. The structures are of two kinds; off-axis interference from the long trajectory only and on-axis interference including the short and long trajectories. The former is readily visible in the far-field spectrum, modulating both the spectral and spatial profile. To access the latter, we vary the chirp of the fundamental, imparting different phases on the different trajectories, thereby changing their relative phase. Using this method together with an analytical model, we are able to explain the on-axis behaviour and access the dipole phase parameters for the short (${\alpha }_{{\rm{s}}}$) and long (${\alpha }_{{\rm{l}}}$) trajectories. The extracted results compare very well with phase parameters calculated by solving the time-dependent Schrödinger equation. Going beyond the analytical model, we are also able to successfully reproduce the off-axis interference structure. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Journal of Physics
volume
18
issue
12
publisher
IOP Publishing Ltd.
external identifiers
  • scopus:85007578539
  • wos:000391599100005
ISSN
1367-2630
DOI
10.1088/1367-2630/aa511f
language
English
LU publication?
yes
id
4d1ab7b5-83c2-4a17-9288-ee099172e9e6
date added to LUP
2016-12-30 12:30:34
date last changed
2017-09-18 11:34:55
@article{4d1ab7b5-83c2-4a17-9288-ee099172e9e6,
  abstract     = {We measure spectrally and spatially resolved high-order harmonics generated in argon using chirped multi-cycle laser pulses. Using a stable, high-repetition rate laser we observe detailed interference structures in the far-field. The structures are of two kinds; off-axis interference from the long trajectory only and on-axis interference including the short and long trajectories. The former is readily visible in the far-field spectrum, modulating both the spectral and spatial profile. To access the latter, we vary the chirp of the fundamental, imparting different phases on the different trajectories, thereby changing their relative phase. Using this method together with an analytical model, we are able to explain the on-axis behaviour and access the dipole phase parameters for the short (${\alpha }_{{\rm{s}}}$) and long (${\alpha }_{{\rm{l}}}$) trajectories. The extracted results compare very well with phase parameters calculated by solving the time-dependent Schrödinger equation. Going beyond the analytical model, we are also able to successfully reproduce the off-axis interference structure.},
  articleno    = {123032},
  author       = {Carlström, Stefanos and Preclíková, Jana and Lorek, Eleonora and Larsen, Esben Witting and Heyl, Christoph Michael and Palecek, David and Zigmantas, Donatas and Schafer, Kenneth Joseph and Gaarde, Mette B and Mauritsson, Johan},
  issn         = {1367-2630},
  language     = {eng},
  month        = {12},
  number       = {12},
  publisher    = {IOP Publishing Ltd.},
  series       = {New Journal of Physics},
  title        = {Spatially and spectrally resolved quantum path interference with chirped driving pulses},
  url          = {http://dx.doi.org/10.1088/1367-2630/aa511f},
  volume       = {18},
  year         = {2016},
}