Defect-excitation processes involved in laser-induced atomic emission and laser ablation of nonmetallic solids

Jai Singh; Noriaki Itoh; Y. Nakai; J. Kanasaki; A. Okano

doi:10.1103/PhysRevB.50.11730

Defect-excitation processes involved in laser-induced atomic emission and laser ablation of nonmetallic solids

Jai Singh, Noriaki Itoh, Y. Nakai, J. Kanasaki, and A. Okano

Phys. Rev. B 50, 11730 – Published 15 October 1994

Abstract

A microscopic theory of defect-induced emission of atoms from nonmetallic surfaces is presented. The results agree very well with the experimental results for the emission yield with the number of laser shots, laser fluence, and incident photon energy. Our results show that the emission of atoms at low photon energy and laser fluence originates only from the surface defects like adatoms and steps. Such emissions cannot be observed from the defect-free surfaces of semiconductors considered here.

Received 19 July 1994

DOI:https://doi.org/10.1103/PhysRevB.50.11730

Authors & Affiliations

Jai Singh

Faculty of Science, Northern Territory University, P.O. Box 40146, Casuarina, Northern Territory 0811, Australia

Noriaki Itoh, Y. Nakai, J. Kanasaki, and A. Okano

Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-01, Japan

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Vol. 50, Iss. 16 — 15 October 1994

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Physical Review B

covering condensed matter and materials physics