We have developed a state-of-the-art apparatus for laser-based spin- and angle-resolved photoemission spectroscopy with micrometer spatial resolution (micro-SARPES). This equipment is achieved through the combination of a high-resolution photoelectron spectrometer, a 6-eV laser with high photon flux that is focused down to a few micrometers, a high-precision sample stage control system, and a double very-low-energy-electron-diffraction spin detector. The setup achieves an energy resolution of 1.5 (5.5) meV without (with) the spin detection mode, compatible with a spatial resolution better than 10 micrometers. This enables us to probe both spatially-resolved electronic structures and vector information of spin polarization in three dimensions. The performance of micro-SARPES apparatus is demonstrated by presenting ARPES and SARPES results from topological insulators and Au photolithography patterns on a Si (001) substrate.
@article{arxiv.2305.14052,
title = {Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector},
author = {Takuma Iwata and T. Kousa and Y. Nishioka and K. Ohwada and K. Sumida and E. Annese and M. Kakoki and Kenta Kuroda and H. Iwasawa and M. Arita and S. Kumar and A. Kimura and K. Miyamoto and T. Okuda},
journal= {arXiv preprint arXiv:2305.14052},
year = {2024}
}