A time- and angle-resolved photoemission spectroscopy with probe photon energy up to 6.7 eV

Abstract

We present the development of a time- and angle-resolved photoemission spectroscopy based on a Yb-based femtosecond laser and a hemispherical electron analyzer. The energy of the pump photon is tunable between 1.4 and 1.9 eV, and the pulse duration is around 30 fs. We use a KBe${}_2$BO${}_3$F${}_2$ non-linear optical crystal to generate probe pulses, of which the photon energy is up to 6.7 eV, and obtain an overall time resolution of 1 ps and energy resolution of 18 meV. In addition, $\beta$-BaB${}_2$O${}_4$ crystals are used to generate alternative probe pulses at 6.05 eV, giving an overall time resolution of 130 fs and energy resolution of 19 meV. We illustrate the performance of the system with representative data on several samples (Bi${}_2$Se${}_3$, YbCd${}_2$Sb${}_2$, FeSe).

8 pages, 5 figures

References in corpus (6)

• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• Tracking Cooper Pairs in a Cuprate Superconductor by Ultrafast Angle-Resolved Photoemission
• Distinguishing bulk and surface electron-phonon coupling in the topological insulator Bi2Se3 using time-resolved photoemission spectroscopy
• Experimental setup for low-energy laser-based angle resolved photoemission spectroscopy
• Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability
• Ultrafast quenching of electron-boson interaction and superconducting gap in a cuprate superconductor

Cited by in corpus (7)

• Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Ultrafast time- and angle-resolved photoemission spectroscopy with widely tunable probe photon energy of 5.3-7.0 eV for investigating dynamics of three-dimensional materials
• Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe${}_2$
• A newly-designed femtosecond KBe${}_2$BO${}_3$F${}_2$ device with pulse duration down to 55 fs for time- and angle-resolved photoemission spectroscopy
• A sample-position-autocorrection system with precision better than 1 \um~in angle-resolved photoemission experiments
• Unusual band splitting and superconducting gap evolution with sulfur substitution in FeSe