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Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy

TitleTunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy
Publication TypeJournal Article
Year of Publication2014
AuthorsJiang, R, Mou, DX, Wu, Y, Huang, LN, McMillen, CD, Kolis, J, Giesber, HG, Egan, JJ, Kaminski, A
JournalReview of Scientific Instruments
Volume85
Pagination033902
Date Published03
Type of ArticleArticle
ISBN Number0034-6748
Accession NumberWOS:000335920400039
Keywordsdeep-ultraviolet, generation, kbbf crystal, kbe2bo3f2 crystal, light
Abstract

We have developed an angle-resolved photoemission spectrometer with tunable vacuum ultraviolet laser as a photon source. The photon source is based on the fourth harmonic generation of a near IR beam from a Ti: sapphire laser pumped by a CWgreen laser and tunable between 5.3 eV and 7 eV. The most important part of the set-up is a compact, vacuum enclosed fourth harmonic generator based on potassium beryllium fluoroborate crystals, grown hydrothermally in the US. This source can deliver a photon flux of over 1014 photon/s. We demonstrate that this energy range is sufficient to measure the kz dispersion in an iron arsenic high temperature superconductor, which was previously only possible at synchrotron facilities. (C) 2014 AIP Publishing LLC.

DOI10.1063/1.4867517
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