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Proceedings Paper

Photoelectron characteristics of optical-information-storing material excited by a 35-ps YAG laser
Author(s): Shaopeng Yang; Guangsheng Fu; Xiaowei Li; Guoyi Dong; Aicong Geng
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Paper Abstract

A YAG super short pulse laser (355nm, 35ps) is used as an exposure source. The electron action in imaging process is directly related to photographic efficiency of silver halide emulsion. Photoelectrons generated under actinic illumination of photographic silver halide systems occur in free, shallow-trapped and deep-trapped states. Different state of electrons has different influence on the dielectric function of silver halide material. The contributions of free and shallow-trapped electrons to the real and the imaginary part of the dielectric function are different by some orders of magnitude. The lifetime of different kinds of electrons can describe these complex processes and the lifetimes of free and shallow-trapped electrons can also reflect the sensitivity and other efficiency of silver halide emulsion. Microwave Absorption and Dielectric Spectrum Detection Technology is a powerful tool that could quickly detect the change of dielectric function of emulsion film. The lifetime and decay curve of the free photoelectrons and shallow trapped electrons of different emulsion samples have been measured and analyzed.

Paper Details

Date Published: 5 September 2002
PDF: 5 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481810
Show Author Affiliations
Shaopeng Yang, Hebei Univ. (China)
Guangsheng Fu, Hebei Univ. (China)
Xiaowei Li, Hebei Univ. (China)
Guoyi Dong, Hebei Univ. (China)
Aicong Geng, Hebei Univ. (China)


Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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