Time- and angle-resolved photoemission spectroscopy with wavelength-tunable pump and extreme ultraviolet probe enabled by twin synchronized amplifiers
arxiv(2024)
摘要
We describe a setup for time- and angle-resolved photoemission spectroscopy
with wavelength-tunable excitation and extreme ultraviolet probe. It is enabled
by using the 10 kHz twin Ti:sapphire amplifiers seeded by the common
Ti:sapphire oscillator. The typical probe energy is 21.7 eV, and the wavelength
of the pump excitation is tuned between 2400 and 1200 nm by using the optical
parametric amplifier. The total energy resolution of 133 meV is achieved, and
the time resolution is dependent on the wavelength for the pump, typically
better than 100 fs. This system enables the pump energy to be matched with a
specific interband transition and to probe a wider energy-momentum space. We
present the results for the prototypical materials of highly oriented pyrolytic
graphite and Bi2Se3 to show the performance of our system.
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