1 December 1991 Optical properties of DC arc-discharge plasma CVD diamond
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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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John M. Trombetta, John M. Trombetta, James T. Hoggins, James T. Hoggins, Paul Klocek, Paul Klocek, Tom A. McKenna, Tom A. McKenna, } "Optical properties of DC arc-discharge plasma CVD diamond", Proc. SPIE 1534, Diamond Optics IV, (1 December 1991); doi: 10.1117/12.48282; https://doi.org/10.1117/12.48282


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