Femtosecond Transient Reflecting Grating Methods and Analysis of the Ultrafast Carrier Dynamics on Si(111) Surfaces
Femtosecond Transient Reflecting Grating Methods and Analysis of the Ultrafast Carrier Dynamics on Si(111) Surfaces
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Si(111)表面超快载流子动力学飞秒瞬态反射光栅方法及分析
DOI：
10.2116/analsci.16.403
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发表时间：
2000
影响因子：
1.6
通讯作者：
A. Harata
中科院分区：
文献类型：
--
作者：
T. Morishita;A. Hibara;T. Sawada;I. Tsuyumoto;A. Harata
发展了飞秒瞬变反射光栅(TRG)方法，并将其应用于监测Si(111)表面光激载流子的超快动力学。测量了TRG响应随泵浦光强度和条纹间距的变化，观察到两个弛豫分量。对结果的分析表明，慢分量对应于载流子扩散，而快分量对应于非平衡载流子的弹道输运和载流子-载流子散射的综合过程。
The femtosecond transient reflecting grating (TRG) method was developed and applied to monitor the ultrafast dynamics of photo-excited carriers on Si(111) surfaces. TRG responses were measured as a function of the pump beam intensity and fringe spacing, and two relaxation components were observed. An analysis of the results has suggested that the slow component corresponds to carrier diffusion and that the fast component corresponds to a combined process between ballistic transport and carrier-carrier scattering of non-equilibrium carriers.