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

Abstract

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.

6 pages, 4 figures

References in corpus (3)

• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• Experimental setup for low-energy laser-based angle resolved photoemission spectroscopy
• A tunable low-energy photon source for high-resolution angle-resolved photoemission spectroscopy

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