Spatially and spectrally resolved quantum path interference with chirped driving pulses.
File(s)
Published version
Author(s)
Type
Journal Article
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.
Date Issued
2016-12-23
Date Acceptance
2016-12-01
Citation
New Journal of Physics, 2016, 18 (12), pp.123032-123032
ISSN
1367-2630
Publisher
IOP Publishing
Start Page
123032
End Page
123032
Journal / Book Title
New Journal of Physics
Volume
18
Issue
12
Copyright Statement
© 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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Subjects
02 Physical Sciences
Fluids & Plasmas
Notes
journal_title: New Journal of Physics article_type: paper article_title: Spatially and spectrally resolved quantum path interference with chirped driving pulses copyright_information: © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft license_information: cc-by Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. date_received: 2016-06-28 date_accepted: 2016-12-01 date_epub: 2016-12-23
Publication Status
Published
Article Number
123032
Date Publish Online
2016-12-23