Electron irradiation and heat treatment of polycrystalline CVD diamond
- 15 February 1993
- journal article
- Published by The Royal Society in Philosophical Transactions A
- Vol. 342 (1664) , 253-260
- https://doi.org/10.1098/rsta.1993.0019
Abstract
Photoluminescence and Raman spectra have been used to characterize the properties of diamond films grown by microwave plasma assisted chemical vapour deposition. Measurements at 77 K and excitation wavelengths in the range 476.5 nm to 514.5 nm show the presence of two components, A and B, in the Raman spectrum in addition to the diamond Raman line. The A and B components are rather similar in appearance and show resonant Raman behaviour. Electron irradiation results in the removal of the A and B Raman components, but they return to their original strength after after heating at 600 °C. The Raman scattering species interact with other point defects in the CVD films during heat treatment, and may be related to the presence of silicon in the diamond film.Keywords
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