X-ray Excited Optical Luminescence from Diamond Thin Films: The Contribution of sp~2 - and H-Bonded Carbon to the Luminescence

摘要

We have employed XEOL and XANES to study the luminescence from a diamond thin film prepared by microwave plasma enhanced CVD technique. Our results and analyses indicate that the observed luminescence, including the broad-band emissions, from CVD diamond films is not associated with the phase impurities of sp~2 - or the H-bonded non-diamond carbon, as previously reported, but it originates from the dominant diamond phase.