Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser

Abstract

We describe a setup of time-, spin-, and angle-resolved photoemission spectroscopy (tr-SARPES) employing a 10.7-eV ($\lambda$=115.6 nm) pulse laser at 1-MHz repetition rate as a probe photon source. This equipment effectively combines technologies of a high-power Yb:fiber laser, ultraviolet-driven harmonic generation in Xe gas, and a SARPES apparatus equipped with very-low-energy-electron-diffraction (VLEED) spin detectors. A high repetition rate (1 MHz) of the probe laser allows experiments with the photoemission space-charge effects significantly reduced, despite a high flux of 10${}^{13}$ photons/s on the sample. The relatively high photon energy (10.7 eV) also brings the capability of observing a wide momentum range that covers the entire Brillouin zone of many materials while ensuring high momentum resolution. The experimental setup overcomes a low efficiency of spin-resolved measurements, which gets even more severe for the pump-probed unoccupied states, and affords for investigating ultrafast electron and spin dynamics of modern quantum materials with energy and time resolutions of 25 meV and 360 fs, respectively.

arXiv comment11 pages, 7 figures

References in corpus (32)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Topological Insulator Materials
• Observation of Floquet-Bloch states on the surface of a topological insulator
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Selective scattering between Floquet-Bloch and Volkov states in a topological insulator
• Landau quantization and the thickness limit of topological insulator thin films of Sb2Te3
• Pseudospin-selective Floquet band engineering in black phosphorus
• Photoelectron spin-flipping and texture manipulation in a topological insulator
• Selective probing of photo-induced charge and spin dynamics in the bulk and surface of a topological insulator
• Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate
• Spin-Polarized Surface Resonances Accompanying Topological Surface State Formation
• Ultrafast extreme ultraviolet photoemission without space charge
• High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light
• Toward the intrinsic limit of topological insulator Bi2Se3
• Ultrafast spin polarization control of Dirac fermions in topological insulators
• Generation of Transient Photocurrents in the Topological Surface State of Sb${}_2$Te${}_3$ by Direct Optical Excitation with Mid-Infrared Pulses
• Momentum resolved spin dynamics of bulk and surface excited states in the topological insulator $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{e}}_3$
• Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability
• Vacuum space charge effect in laser-based solid-state photoemission spectroscopy
• High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser
• Time-Resolved Momentum Microscopy with a 1 MHz High-Harmonic Extreme Ultraviolet Beamline
• A quantitative comparison of time-of-flight momentum microscopes and hemispherical analyzers for time- and angle-resolved photoemission spectroscopy experiments
• Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
• High resolution time- and angle-resolved photoemission spectroscopy with 11 eV laser pulses
• Rashba spin splitting of L-gap surface states on Ag(111) and Cu(111)
• Coherent control over three-dimensional spin polarization for the spin-orbit coupled surface state of Bi${}_2$Se${}_3$
• Topologically entangled Rashba-split Shockley states on the surface of grey arsenic
• Spin-, time- and angle-resolved photoemission spectroscopy on WTe${}_2$
• High repetition pump-and-probe photoemission spectroscopy based on a compact fiber laser system
• HHG-laser-based time- and angle-resolved photoemission spectroscopy of quantum materials
• The role of spin-lattice coupling for ultrafast magnetization changes in rare earth metals

Cited by in corpus (7)

• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
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• Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets
• Cavity-induced coherent magnetization and polaritons in altermagnets
• High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source
• Development of a 10.8-eV Tabletop Femtosecond Laser with Tunable Polarization for High-Resolution Angle-Resolved Photoemission Spectroscopy
• Photoemission angular distribution beyond the single wavevector description of photoelectron final states