We present the development of a multi-resolution photoemission spectroscopy (MRPES) setup which probes quantum materials in energy, momentum, space, and time. This versatile setup integrates three light sources in one photoemission setup, and can conveniently switch between traditional angle-resolved photoemission spectroscopy (ARPES), time-resolved ARPES (trARPES), and micron-scale spatially resolved ARPES (μARPES). It provides a first-time all-in-one solution to achieve an energy resolution <4 meV, a time resolution <35 fs, and a spatial resolution ∼10μm in photoemission spectroscopy. Remarkably, we obtain the shortest time resolution among the trARPES setups using solid-state nonlinear crystals for frequency upconversion. Furthermore, this MRPES setup is integrated with a shadow-mask assisted molecular beam epitaxy system, which transforms the traditional photoemission spectroscopy into a quantum device characterization instrument. We demonstrate the functionalities of this novel quantum material testbed using FeSe/SrTiO3 thin films and MnBi4Te7 magnetic topological insulators.
@article{arxiv.2109.13075,
title = {An Integrated Quantum Material Testbed with Multi-Resolution Photoemission Spectroscopy},
author = {Chenhui Yan and Emanuel Green and Riku Fukumori and Nikola Protic and Seng Huat Lee and Sebastian Fernandez-Mulligan and Rahim Raja and Robin Erdakos and Zhiqiang Mao and Shuolong Yang},
journal= {arXiv preprint arXiv:2109.13075},
year = {2021}
}