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Proceedings Paper

The granulated gold-film-based semitransparent photocathodes in the visible spectrum range for femtosecond time-resolution experiments
Author(s): E. L. Nolle; M. Ya. Schelev; V. I. Lozovoi; N. D. Polikarkina; N. S. Vorobiev
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Paper Abstract

Developed is the granulated, Au film-based, semitransparent photocathode consisting of spherical Au nanoparticles. The granulated Au films are activated by a thin layer of cesium and oxygen of about two monolayer thicknesses to decrease the work function down to about 1 eV and gain the photoemission effect in the visible spectrum range. The sensitivity maximum equal to about one mA/W is located in the green spectrum range. The nanoparticles formation and photocathode surface structure are studied with the use of the X-ray photoelectron spectroscopy technique. Those studies have shown that the photoemission effect in the wavelength range &lgr;> 450 nm is conditioned by excitation of the surface plasmons in quasi-spherical Au nanoparticles. This has allowed manufacturing of a streak tube with the introducible, Au nanoparticles-based photocathode, stability of which has been remaining invariant.

Paper Details

Date Published: 17 January 2007
PDF: 5 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797N (17 January 2007); doi: 10.1117/12.728648
Show Author Affiliations
E. L. Nolle, A.M. Prokhorov General Physics Institute (Russia)
M. Ya. Schelev, A.M. Prokhorov General Physics Institute (Russia)
V. I. Lozovoi, A.M. Prokhorov General Physics Institute (Russia)
N. D. Polikarkina, A.M. Prokhorov General Physics Institute (Russia)
N. S. Vorobiev, A.M. Prokhorov General Physics Institute (Russia)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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