Optical properties of DC arc-discharge plasma CVD diamond

John M. Trombetta; James T. Hoggins; Paul Klocek; Tom A. McKenna

doi:10.1117/12.48282

1 December 1991 Optical properties of DC arc-discharge plasma CVD diamond

John M. Trombetta, James T. Hoggins, Paul Klocek, Tom A. McKenna

Proceedings Volume 1534, Diamond Optics IV; (1991) https://doi.org/10.1117/12.48282
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Mid-infrared transmission and absorption in polycrystalline chemical vapor deposition (CVD) diamond films has been studied. Free-standing films were grown in a DC arc-discharge plasma torch apparatus. The intensity of a band near 3.5 micrometers , which was assigned in previous work to a C-H bond-stretching mode, correlates with the hydrogen concentration. One symmetric and one antisymmetric stretching mode were observed, with frequencies corresponding to an sp³-bonded CH₂ species. In some films, the hydrogen-related absorption was reduced below 1 cm^-1. A broadband at 8 micrometers scales in intensity with the 3.5-micrometers band, suggesting its association with hydrogen as well. A sharp feature at 1,330 to 1,335 cm^-1 tentatively is assigned to defect-activated absorption by O((Gamma) ) phonons.

Citation Download Citation

John M. Trombetta, James T. Hoggins, Paul Klocek, and Tom A. McKenna "Optical properties of DC arc-discharge plasma CVD diamond", Proc. SPIE 1534, Diamond Optics IV, (1 December 1991); https://doi.org/10.1117/12.48282

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