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          Institute: MPI für Kernphysik     Collection: Physics with Ultrashort Laser Pulses     Display Documents

ID: 278813.0, MPI für Kernphysik / Physics with Ultrashort Laser Pulses
Determination of the carrier-envelope phase of few-cycle laser pulses with terahertz-emission spectroscopy
Authors:Kreß, M.; Löffler, T.; Thomson, M.; Dörner, R.; Gimpel, H.; Zrost, K.; Ergler, T.; Moshammer, R.; Morgner, U.; Ullrich, J.; Roskos, H. G.
Date of Publication (YYYY-MM-DD):2006-05
Title of Journal:Nature Physics
Issue / Number:5
Start Page:327
End Page:331
Copyright:© 2006 Nature Publishing Group
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:The availability of few-cycle optical pulses opens a window to physical phenomena occurring on the attosecond timescale. To take full advantage of such pulses, it is crucial to measure1, 2, 3, 4 and stabilize1, 2 their carrier-envelope (CE) phase, that is, the phase difference between the carrier wave and the envelope function. We introduce an approach to determine the CE phase by down-conversion of the laser light to the terahertz (THz) frequency range by means of plasma generation in ambient air, an isotropic medium where optical rectification (down-conversion) in the forward direction is only possible if the inversion symmetry is broken by electrical or optical means5, 6, 7, 8, 9, 10. We show that few-cycle pulses directly produce a spatial charge asymmetry in the plasma. The asymmetry, associated with THz emission, depends on the CE phase, which allows determination of the phase by measurement of the amplitude and polarity of the THz pulse.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group J. Ullrich/Strong-Fields Physics (R. Moshammer)
External Affiliations:Physikalisches Institut, Johann Wolfgang Goethe-Universität, Max-von-Laue-Str. 1, D-60438 Frankfurt (M), Germany
Institut für Kernphysik, Johann Wolfgang Goethe-Universität, Max-von-Laue-Str. 1, D-60438 Frankfurt (M), Germany
Institut für Quantenoptik, D-30167 Hannover, Germany
ISSN:ISSN: 1745-2473
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