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Proceedings Paper

Structural change in amorphous carbon on core excitations induced by soft x-ray illumination
Author(s): Koji Maeda; Shijin Liang; Yoshihisa Harada; Yoshinori Kitajima; Shik Shin; Yutaka Mera
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Paper Abstract

Effects of carbon 1s core excitations on the structure of tetrahedral amorphous carbon films were investigated by illuminating samples with intense soft X-rays from a synchrotron radiation source in the photon energy range of 240 eV to 310 eV. The structural changes detected in the X-ray absorption spectra obtained before and after the intense illumination are characterized by graphitic ordering, similar to the effect of high-energy electron irradiation. The excitation spectrum for the photo-stimulated structural changes was found to consist of a non-resonant component and a resonant component peaking at 289 eV close to the 288 eV XAS peak characteristic of ta-C films. The microscopic mechanisms are discussed for the non-resonant and the resonant effects.

Paper Details

Date Published: 23 May 2007
PDF: 10 pages
Proc. SPIE 6586, Damage to VUV, EUV, and X-ray Optics, 65860C (23 May 2007); doi: 10.1117/12.723791
Show Author Affiliations
Koji Maeda, The Univ. of Tokyo (Japan)
Shijin Liang, The Univ. of Tokyo (Japan)
Yoshihisa Harada, RIKEN/SPring-8 (Japan)
Yoshinori Kitajima, KEK/PF (Japan)
Shik Shin, RIKEN/SPring-8 (Japan)
The Univ. of Tokyo (Japan)
Yutaka Mera, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6586:
Damage to VUV, EUV, and X-ray Optics
Libor Juha; Ryszard H. Sobierajski; Hubertus Wabnitz, Editor(s)

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