Tunable VUV laser based spectrometer for Angle Resolved Photoemission Spectroscopy (ARPES)

Adam Kaminski; Colin D. McMillen; Daixiang Mou; Henry G. Giesber III; John J. Egan; Joseph Kolis; Lunan Huang; Rui Jiang; Yun Wu

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Tunable VUV laser based spectrometer for Angle Resolved Photoemission Spectroscopy (ARPES)

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arxiv 1401.5404 v1 pith:WOHQXX27 submitted 2014-01-21 physics.optics cond-mat.str-el

Rui Jiang , Daixiang Mou , Yun Wu , Lunan Huang , Colin D. McMillen , Joseph Kolis , Henry G. Giesber III , John J. Egan

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Adam Kaminski

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classification physics.opticscond-mat.str-el

keywords laserphotonsourcetunablefourthharmonicphotoemissionspectrometer

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We have developed an angle-resolved photoemission spectrometer with tunable VUV 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 CW green laser and tunable between 5.3eV and 7eV. The most important part of the set-up is a compact, vacuum enclosed fourth harmonic generator based on KBBF crystals, grown hydrothermally in the US. This source can deliver a photon flux of over 10^14 photons/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.

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