Resonance effects in Raman scattering from polycrystalline diamond films
Resonance effects in Raman scattering from polycrystalline diamond films
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DOI：
10.1063/1.105340
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发表时间：
1991-08
影响因子：
4
通讯作者：
J. Wagner;C. Wild;P. Koidl
中科院分区：
文献类型：
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作者：
J. Wagner;C. Wild;P. Koidl
我们报道了利用大范围的入射光子能量(1.16-4.82 eV)对多晶金刚石薄膜进行的拉曼光谱研究。非晶态Sp2键合碳的散射强度随着入射光子能量的变化与SP3键合金刚石的1332 cm−1拉曼线的强度相比有很大的不同。随着光子能量的降低，sp2键碳的表观散射峰位置也发生了频率下移。红外激发对非晶态sp2键合碳的散射具有很高的敏感性，而紫外线激发则大大增强了晶体金刚石的1332 cm−-1信号，即使在纳米晶体薄膜中也是如此。
We report on a Raman spectroscopic study of polycrystalline diamond films using a wide range of incident photon energies (1.16–4.82 eV). The scattering intensity of amorphous sp2‐bonded carbon is found to vary considerably as a function of the incident photon energy as compared to the strength of the 1332 cm−1 Raman line from sp3‐bonded diamond. There is also a frequency downshift of the apparent peak position for scattering from the sp2‐bonded carbon with decreasing photon energy. Excitation in the infrared range is shown to give a high sensitivity to scattering from amorphous sp2‐bonded carbon whereas ultraviolet excitation enhances the 1332 cm−1 signal from crystalline diamond considerably even in nanocrystalline films.