Kozák M, Trojánek F, Galář P, Varga M, Kromka A, Malý P
Opt Express. 2013 Dec 16;21(25):31521-9. doi: 10.1364/OE.21.031521.
We report on the time-resolved coherent anti-Stokes Raman spectroscopy of phonon dephasing in micro- and nanocrystalline diamond films. The dephasing times T(2) were found to be dependent on the morphology of diamond films (average size of crystals and content of nondiamond carbon phase) and changed from 0.7 to 1.72 ps. The dephasing times were found to be temperature independent in the range 10-295 K. In addition to diamond Raman active phonon mode at 1332 cm(-1), we investigated also the dynamics of a broad Raman peak at 1530 cm(-1) which is present in samples with higher content of nondiamond sp(2) hybridized carbon phase. This peak was found to be homogenously broadened with very fast dephasing (T(2)~50 fs).
我们报道了关于微纳晶金刚石薄膜中声子退相的时间分辨相干反斯托克斯拉曼光谱。发现退相时间T(2)取决于金刚石薄膜的形态（晶体平均尺寸和非金刚石碳相含量），范围从0.7皮秒到1.72皮秒。发现在10 - 295K范围内退相时间与温度无关。除了在1332厘米^(-1)处的金刚石拉曼活性声子模式外，我们还研究了在1530厘米^(-1)处一个宽拉曼峰的动力学，该峰存在于非金刚石sp(2)杂化碳相含量较高的样品中。发现这个峰是均匀展宽的，退相非常快（T(2)约为50飞秒）。
