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Tunable ultrafast extreme ultraviolet source for time- and angle-resolved photoemission spectroscopy
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10.1063/1.3460267
/content/aip/journal/rsi/81/7/10.1063/1.3460267
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/7/10.1063/1.3460267
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup for visible pump/XUV probe ARPES: the visible beam (1.55 or 3.1 eV) traverses a delay stage that controls the timing of the pulses; the XUV beam is produced via HHG in argon, propagates through a TDCM for spectral selection, and is refocused almost collinearly with the visible beam on the sample in a UHV chamber, containing a hemispherical electron analyzer.

Image of FIG. 2.
FIG. 2.

(a) An image of the beam on the CCD camera containing all harmonics. The average size is FWHM. (b) Interference pattern of H13 from a double-pinhole ( in diameter, apart). The outer ring results from overlapping diffraction Airy patterns originating from both pinholes.

Image of FIG. 3.
FIG. 3.

Photoemission spectrum from using a XUV beam containing all generated high-harmonics. The peaks are replicas of the electronic structure near the Fermi edge, separated by . Analyzer work function is .

Image of FIG. 4.
FIG. 4.

Photoemission spectra of copper, obtained by selecting individual harmonics. The peaks originate from electrons; the small step above the peak represents the Fermi edge.

Image of FIG. 5.
FIG. 5.

Angle-integrated photoemission of using . The inset shows the spectrum obtained at SRC (Stoughton, WI) using .

Image of FIG. 6.
FIG. 6.

(a) Angle-integrated photoemission from GaAs at 12 K using . (b) Angle-resolved photoemission at ±4° analyzer acceptance angle; the range of accessible momentum values is split in 25 channels. (c) The resulting energy-momentum photoemission map.

Image of FIG. 7.
FIG. 7.

Angle-resolved photoemission map of at 12 K using .

Image of FIG. 8.
FIG. 8.

(a) Photoelectron spectra of Ge at time delay of 0 (dotted line) and 30 ps (solid line) between the pump and probe pulses. Pump pulse intensity was . Inset: static photoemission of Ge using . (b) Dynamics of the transient electron population, integrated in the 19–22 eV kinetic energy range.

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/content/aip/journal/rsi/81/7/10.1063/1.3460267
2010-07-20
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable ultrafast extreme ultraviolet source for time- and angle-resolved photoemission spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/7/10.1063/1.3460267
10.1063/1.3460267
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