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Proceedings Paper

Laser-induced structure transformations of diamonds
Author(s): V. V. Kononenko; T. V. Kononenko; S. M. Pimenov; Vitali I. Konov; P. Fischer; V. Romano; H. P. Weber; A. V. Khomich; R. A. Khmelnitskiy; V. N. Strekalov
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Paper Abstract

Results are reported on the study of phase transformations in diamonds induced by nano- and picosecond pulses of KrF excimer laser (λ=248 nm) and second harmonic of a YAP:Nd laser (λ=539 nm). Main attention in the research was paid to i) laser-induced graphitization of high-quality CVD diamond plates and ii) laser-induced structure transitions in ion-implanted diamond single crystals. For CVD diamond, the thickness of the laser-graphitized surface layers was measured and the accumulation period for graphitization to occur was found to be longer for lower laser fluences. In the experiments with ion-implanted diamonds, multipulse laser irradiation at fluences lower than the graphitization thresholds resulted in progressive annealing, i.e., in an increase of the optical transmission and surface contraction. Under certain low-intensity irradiation conditions, it was also found that, competing with the annealing process, laser etching of the ion-implanted diamond occurred at extremely low rates of 10-4-10-3 nm/pulse. A correlation between the defect concentration distribution and graphitization thresholds in partially annealed ion-implanted diamonds is discussed.

Paper Details

Date Published: 2 September 2003
PDF: 12 pages
Proc. SPIE 5121, Laser Processing of Advanced Materials and Laser Microtechnologies, (2 September 2003); doi: 10.1117/12.515610
Show Author Affiliations
V. V. Kononenko, General Physics Institute (Russia)
T. V. Kononenko, General Physics Institute (Russia)
S. M. Pimenov, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)
P. Fischer, Univ. Bern (Switzerland)
V. Romano, Univ. Bern (Switzerland)
H. P. Weber, Univ. Bern (Switzerland)
A. V. Khomich, Institute of Radio Engineering and Electronics (Russia)
R. A. Khmelnitskiy, P.N. Lebedev Physical Institute (Russia)
V. N. Strekalov, Moscow State Technological Univ. Stakin (Russia)

Published in SPIE Proceedings Vol. 5121:
Laser Processing of Advanced Materials and Laser Microtechnologies
Friedrich H. Dausinger; Vitali I. Konov; Vladimir Yu. Baranov; Vladislav Ya. Panchenko, Editor(s)

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