Angle-resolved photoemission spectroscopy with a femtosecond high harmonic light source using a two-dimensional imaging electron analyzer

An experimental setup for time- and angle-resolved photoemission spectroscopy using a femtosecond 1 kHz high harmonic light source and a two-dimensional electron analyzer for parallel energy and momentum detection is presented. A selection of the 27th harmonic ( 41.85 eV ) from the harmonic spectrum...

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Bibliographic Details
Published in:	Review of scientific instruments 2007-08, Vol.78 (8), p.083105-083105-8
Main Authors:	Mathias, S, Miaja-Avila, L, Murnane, M M, Kapteyn, H, Aeschlimann, M, Bauer, M
Format:	Article
Language:	eng
Subjects:	Computer-Aided Design Equipment Design Equipment Failure Analysis Lighting - instrumentation Lighting - methods Microscopy, Electron - instrumentation Microscopy, Electron - methods Pilot Projects Reproducibility of Results Sensitivity and Specificity Spectrometry, X-Ray Emission - instrumentation Spectrometry, X-Ray Emission - methods
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Summary:	An experimental setup for time- and angle-resolved photoemission spectroscopy using a femtosecond 1 kHz high harmonic light source and a two-dimensional electron analyzer for parallel energy and momentum detection is presented. A selection of the 27th harmonic ( 41.85 eV ) from the harmonic spectrum of the light source is achieved with a multilayer Mo ∕ Si double mirror monochromator. The extinction efficiency of the monochromator in selecting this harmonic is shown to be better than 7:1, while the transmitted bandwidth of the selected harmonic is capable of supporting temporal pulse widths as short as 3 fs . The recorded E ( k ) photoelectron spectrum from a Cu(111) surface demonstrates an angular resolution of better than 0.6° ( = 0.03 Å − 1 at E kin , e = 36 eV ). Used in a pump-probe configuration, the described experimental setup represents a powerful experimental tool for studying the femtosecond dynamics of ultrafast surface processes in real time.
ISSN:	0034-6748 1089-7623