Phase control of attosecond pulses in a train

Summary, in English

Ultrafast processes in matter can be captured and even controlled by using sequences of few-cycle optical pulses, which need to be well characterized, both in amplitude and phase. The same degree of control has not yet been achieved for few-cycle extreme ultraviolet pulses generated by high-order harmonic generation (HHG) in gases, with duration in the attosecond range. Here, we show that by varying the spectral phase and carrier-envelope phase (CEP) of a high-repetition rate laser, using dispersion in glass, we achieve a high degree of control of the relative phase and CEP between consecutive attosecond pulses. The experimental results are supported by a detailed theoretical analysis based upon the semi-classical three-step model for HHG.

• Author: Chen Guo; Anne Harth; Stefanos Carlström; Yu Chen Cheng; Sara Mikaelsson; Erik Marsell; Christoph Heyl; Miguel Miranda; Mathieu Gisselbrecht; Mette B. Gaarde; Kenneth J. Schafer; Anders Mikkelsen; Johan Mauritsson; Cord L. Arnold; Anne L'Huillier
• Department/s: Atomic Physics; Synchrotron Radiation Research; NanoLund: Centre for Nanoscience
• Publishing year: 2018-01-16
• Language: English
• Publication/Series: Journal of Physics B: Atomic, Molecular and Optical Physics
• Volume: 51
• Issue: 3
• Links: http://dx.doi.org/10.1088/1361-6455/aa9953
• Document type: Journal article
• Publisher: IOP Publishing
• Topic: Atom and Molecular Physics and Optics
• Keywords: attosecond pulse; carrier-envelope phase; High-order harmonic generation
• Status: Published
• ISBN/ISSN/Other: ISSN: 0953-4075