New spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations. Using these results, the Na2KSb/Cs3Sb heterostructure is designed as a spin-polarized electron source in combination with the Al0.11Ga0.89As target as a spin-detector with spatial resolution. In the Na2KSb/Cs3Sb photocathode, spin-dependent photoemission properties were established through detection of high degree of photoluminescence polarization and high polarization of the photoemitted electrons. It was found that the multi-alkali photocathode can provide electron beams with emittance very close to the limits imposed by the electron thermal energy. The vacuum tablet-type sources of spin-polarized electrons have been proposed for accelerators, that can exclude the construction of the photocathode growth chambers for photoinjectors.
@article{arxiv.2205.03693,
title = {New spin-polarized electron source based on alkali-antimonide photocathode},
author = {V. S. Rusetsky and V. A. Golyashov and S. V. Eremeev and D. A. Kustov and I. P. Rusinov and T. S. Shamirzaev and A. V. Mironov and A. Yu. Demin and O. E. Tereshchenko},
journal= {arXiv preprint arXiv:2205.03693},
year = {2022}
}