Finite-size effect on the surface deformation thermal mirror method
Finite-size effect on the surface deformation thermal mirror method
复制标题
有限尺寸效应对表面形变热镜法的影响
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
C. Jacinto
中科院分区：
文献类型：
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作者：
N. Astrath;L. Malacarne;V. S. Zanuto;M. Belançon;R. S. Mendes;M. Baesso;C. Jacinto
介绍了热镜（TM）实验中的有限尺寸效应。时间分辨的热弹性变形方程求解和半无限的解决方案进行了比较。为了确定半无限模型的适用性，在光学玻璃中进行实验，并将定量结果与两种模型进行比较。这里提出的分析结果被发现是在良好的协议与数值有限元分析模型。建模和实验表明，TM瞬态信号的强烈影响，样品厚度的减少。有限尺寸模型的结果表明，它本质上是更准确地表征低光学吸收薄样品的物理性质，这表明该模型和TM方法甚至可以应用于研究非常薄的薄膜下降到微米尺度。
The finite-size effect on the thermal mirror (TM) experiments is described. The time-resolved thermoelastic deformation equation is solved and compared to the semi-infinite solution. To determine the applicability of the semi-infinite model, experiments were performed in optical glasses and the quantitative results compared to both models. The analytical results presented here were found to be in excellent agreement with the numerical finite elemental analysis model. Modeling and experiment showed that the TM transient signal is strongly affected as the sample thickness is reduced. The results of the finite-size model demonstrate that it is intrinsically more accurate to characterize physical properties of low optical absorption thin samples, which suggests that the model and the TM method could even be applied to study very thin films down to the micrometer scale.