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Proceedings Paper

Picosecond photoconductivity of natural and CVD diamonds
Author(s): Serge V. Garnov; Sergej M. Pimenov; Victor G. Ralchenko; Sergei M. Klimentov; Vitali I. Konov; K. G. Korotoushenko; E. D. Obraztsova; S. P. Plotnikova; D. M. Sagatelyan; Sandor Holly
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Paper Abstract

Photoexcitation and recombination of nonequilibrium charge carriers in both natural gemstone diamonds and CVD (chemical vapor deposition) polycrystalline diamond films in UV spectrum regions have been investigated. Transient picosecond photoconductivity technique applied permitted to conduct measurements with the time resolution better than 200 picoseconds and to register a charge carrier concentration value as low as 1020 - 1013 cm-3. The dependencies of photocurrent amplitude as a function of incident laser radiation intensity in the range from 103 to 1010 W/cm2 have been obtained. Charge carrier lifetimes had been measured and charge carrier drift mobility were estimated. It is shown that the electronic properties of high quality thick CVD diamond films are comparable to those of the most perfect natural type IIa crystals. Investigation of Raman and luminescence spectra of diamonds have been performed along with scanning electron microscopy studies to characterize bulk and surface structure of tested specimens.

Paper Details

Date Published: 14 July 1995
PDF: 10 pages
Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); doi: 10.1117/12.213747
Show Author Affiliations
Serge V. Garnov, General Physics Institute (Russia)
Sergej M. Pimenov, General Physics Institute (Russia)
Victor G. Ralchenko, General Physics Institute (Russia)
Sergei M. Klimentov, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)
K. G. Korotoushenko, General Physics Institute (Russia)
E. D. Obraztsova, General Physics Institute (Russia)
S. P. Plotnikova, General Physics Institute (Russia)
D. M. Sagatelyan, General Physics Institute (Russia)
Sandor Holly, Rockwell International Corp. (United States)

Published in SPIE Proceedings Vol. 2428:
Laser-Induced Damage in Optical Materials: 1994
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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