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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 2, Iss. 11 — Nov. 1, 1985
  • pp: 1848–1851

Microstructure of S-1 photoemitting surfaces

C. W. Bates, Jr. and N. Alexander  »View Author Affiliations

JOSA A, Vol. 2, Issue 11, pp. 1848-1851 (1985)

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A model of the microstructure of S-1 photocathodes is presented that explains the variation of the quantum yield from 300 to 1200 nm. This model, a refinement of an earlier one, is a three-layered structure, consisting of a base layer ≥30 nm thick with Cs11O3-coated (1- to 2-nm thickness) Ag microparticles in a matrix of Cs2O, a transition layer with Cs11O3-coated Ag microparticles partly immersed in the Cs2O and partly protruding into the vacuum, and an upper layer of Cs11O3-coated Ag microparticles completely in vacuum. This microstructure satisfactorily explains the additional silvering process and superficial oxidation performed on these surfaces. A theoretical calculation of the quantum yield based on a recently reformulated theory of optical absorption of inhomogeneous composite materials by us gives excellent agreement with the experimental data.

© 1985 Optical Society of America

Original Manuscript: April 15, 1985
Manuscript Accepted: July 2, 1985
Published: November 1, 1985

C. W. Bates and N. Alexander, "Microstructure of S-1 photoemitting surfaces," J. Opt. Soc. Am. A 2, 1848-1851 (1985)

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