Alkali azide based growth of high quantum efficiency photocathodes

Luca Cultrera, Mark Brown, Siddharth Karkare, William Schaff, Ivan Bazarov, Bruce Dunham

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The authors report on successful growth of bialkali photocathode based on CsK2Sb using the alkali metal vapors generated by thermal decomposition of alkali azides. Details about the ultrahigh vacuum growth system and the procedure used are provided. The final quantum efficiency of the photocathode under illumination with 532 nm laser is 9.6%. This value is comparable to the largest ones obtained in our previous experiments using commercial dispensers, indicating that alkali azides are a viable alternative.

Original languageEnglish (US)
Article number031211
JournalJournal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Issue number3
StatePublished - May 2014


ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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