Journal
OPTICS LETTERS
Volume 36, Issue 10, Pages 1746-1748Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.001746
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Funding
- The Engineering and Physical Sciences Research Council (EPSRC) [EP/H000178/1, EP/F034601/1, EP/E028063/1]
- European Union (EU) [PITN-GA-2008-214962]
- Royal Society
- Leverhulme Trust [F/08776/C]
- EPSRC [EP/E028063/1, EP/F034601/1, EP/E036066/1, EP/H000178/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E036066/1, EP/F034601/1, EP/H000178/1, EP/E028063/1] Funding Source: researchfish
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We present a technique for frequency-resolved wavefront characterization of high harmonics based on lateral shearing interferometry. Tilted replicas of the driving laser pulse are produced by a Mach-Zehnder interferometer, producing separate focii in the target. The interference of the resulting harmonics on a flat-field extreme ultraviolet spectrometer yields the spatial phase derivative. A comprehensive set of spatial profiles, resolved by harmonic order, validate the technique and reveal the interplay of single-atom and macroscopic effects. (C) 2011 Optical Society of America
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