The granulated gold-film-based semitransparent photocathodes in the visible spectrum range for femtosecond time-resolution experiments

E. L. Nolle; M. Ya. Schelev; V. I. Lozovoi; N. D. Polikarkina; N. S. Vorobiev

doi:10.1117/12.728648

17 January 2007 The granulated gold-film-based semitransparent photocathodes in the visible spectrum range for femtosecond time-resolution experiments

E. L. Nolle, M. Ya. Schelev, V. I. Lozovoi, N. D. Polikarkina, N. S. Vorobiev

Author Affiliations +

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62797N (2007) https://doi.org/10.1117/12.728648
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

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.

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E. L. Nolle, M. Ya. Schelev, V. I. Lozovoi, N. D. Polikarkina, and N. S. Vorobiev "The granulated gold-film-based semitransparent photocathodes in the visible spectrum range for femtosecond time-resolution experiments", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797N (17 January 2007); https://doi.org/10.1117/12.728648

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