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Proceedings Paper

Cathodoluminescence, Absorption And Raman Spectra Of Individual Particles And Polished Films Of Vapor Deposited Diamond
Author(s): Mutsukazu Kamo; Yoichiro Sato; Alan T. Collins
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Paper Abstract

Cathodoluminescence, absorption and Raman spectra of diamond particles and polycrystalline films prepared by a microwave plasma method from gaseous mixtures of methane and hydrogen have been studied. The results are discussed in relation to the effect of the methane concentration on the optical properties of the diamond material produced. Absorption edge at 5.5eV was observed for the polished film prepared at 0.3% methane concentration, and for particles prepared at 1% methane concentration containing water vapor. Edge emission in the cathodoluminescence spectra was observed for particles obtained at methane concentrations from 0.5 to 2%, while the emission was not observed in the films obtained at the same conditions. The edge emission became weaker with increasing methane concentration. The results indicate that the particles prepared at lower methane concentrations are high quality diamond similar to type IIa diamond, the purest form of natural diamond, while the films are heavily strained.

Paper Details

Date Published: 15 January 1989
PDF: 8 pages
Proc. SPIE 1146, Diamond Optics II, (15 January 1989); doi: 10.1117/12.962075
Show Author Affiliations
Mutsukazu Kamo, National Institute for Research in Inorganic Materials (Japan)
Yoichiro Sato, National Institute for Research in Inorganic Materials (Japan)
Alan T. Collins, King's College London (United Kingdom)


Published in SPIE Proceedings Vol. 1146:
Diamond Optics II
Albert Feldman; Sandor Holly, Editor(s)

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