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

Abstract

Time- and angle-resolved photoemission spectroscopy (TrARPES) is a powerful technique for capturing the ultrafast dynamics of charge carriers and revealing photo-induced phase transitions in quantum materials. However, the lack of widely tunable probe photon energy, which is critical for accessing the dispersions at different out-of-plane momentum $k_z$ in TrARPES measurements, has hindered the ultrafast dynamics investigation of 3D quantum materials such as Dirac or Weyl semimetals. Here we report the development of a TrARPES system with a highly tunable probe photon energy from 5.3 to 7.0 eV. The tunable probe photon energy is generated by the fourth harmonic generation of a tunable wavelength femtosecond laser source by combining a $\beta$-BaB${}_2$O${}_4$ (BBO) crystal and a KBe${}_2$BO${}_3$F${}_2$ (KBBF) crystal. High energy resolution of 29 - 48 meV and time resolution of 280 - 320 fs are demonstrated on 3D topological materials ZrTe${}_5$ and Sb${}_2$Te${}_3$. Our work opens up new opportunities for exploring ultrafast dynamics in 3D quantum materials.

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Cited by in corpus (11)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Angle-resolved photoemission spectroscopy
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Population inversion and Dirac fermion cooling in 3D Dirac semimetal Cd${}_3$As${}_2$
• Multispectral time-resolved energy-momentum microscopy using high-harmonic extreme ultraviolet radiation
• Ultrafast Carrier Relaxation Dynamics in a Nodal-Line Semimetal PtSn${}_4$
• Development of a Laser-based angle-resolved-photoemission spectrometer with sub-micrometer spatial resolution and high-efficiency spin detection
• 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
• Hidden charge density wave induced shadow bands and ultrafast dynamics of CuTe investigated using time-resolved ARPES
• High harmonic generation light source with polarization selectivity and sub-100-$\mu$m beam size for time- and angle-resolved photoemission spectroscopy
• High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source