Stoichiometry control and automated growth of alkali antimonide photocathode films by molecular beam deposition

Journal Article · 28 February 2022 · Applied Physics Letters

DOI: https://doi.org/10.1063/5.0080948 · OSTI ID:1859903

Pavlenko, Vitaly  ^[1]; Smedley, John Morgan  ^[1]; Scheinker, Alexander  ^[1]; Fleming, Ryan Lee  ^[1]; Alexander, Anna Marie  ^[1]; Hoffbauer, Mark Arles  ^[1]; Moody, Nathan Andrew  ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We report on a method of photoemissive film growth that controls stoichiometry in real time. We show that stoichiometry control using a feedback loop is possible because (a) photoemissive properties exhibit a distinct dependence on the stoichiometric composition and (b) stoichiometric composition strongly depends on the ratio of the incident fluxes. The reported results were obtained on Cs₃Sb but are expected to be relevant to other alkali antimonides and tellurides.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: 89233218CNA000001; SC0013190
• OSTI ID: 1859903
• Report Number(s): LA-UR-21-30432
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 120; ISSN 0003-6951
• Publisher: American Institute of Physics (AIP)Copyright Statement
• Country of Publication: United States
• Language: English