Photothermal mirror Z-scan spectrometry of opaque samples
Photothermal mirror Z-scan spectrometry of opaque samples
复制标题
DOI：
10.1364/josab.36.002907
复制
发表时间：
2019-10-01
影响因子：
1.9
通讯作者：
Olaizola, Aristides Marcano
中科院分区：
文献类型：
--
作者：
Olaizola, Aristides Marcano
本文介绍了一种泵浦探针光热镜z扫描方法，用于测量不透明固体的热量子产率、热扩散率和其他光热参数。泵浦光束聚焦到样品上产生热弹性表面畸变。扭曲的表面就像一面镜子，影响产生实验信号的反射探针光束的衍射图样。扫描聚焦透镜产生单峰光热镜z扫描特征。信号的振幅和时间演变决定了样品的光热性质。用该方法对砷化镓和硅片进行了分析，结果与前人的研究结果吻合较好。(C) 2019美国光学学会。
This contribution introduces a pump-probe photothermal mirror Z-scan method to measure the thermal quantum yield, the thermal diffusivity, and other photothermal parameters of an opaque solid. The focusing of a pump beam of light onto the sample generates thermoelastic surface distortions. The distorted surface acts as a mirror affecting the diffraction pattern of a reflected probe beam yielding the experimental signal. Scanning the focusing lens produces a single peak photothermal mirror Z-scan signature. The amplitude and time evolution of the signal determines the sample's photothermal properties. The method is used to analyze gallium arsenide and silicon plates, obtaining good agreement with previous studies. (C) 2019 Optical Society of America.