Separation Problems in Optical Spectroscopies
Separation Problems in Optical Spectroscopies
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DOI：
10.1238/physica.topical.109a00080
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发表时间：
2004
期刊：
影响因子：
2.9
通讯作者：
B. Koopmans
中科院分区：
文献类型：
--
作者：
B. Koopmans
光谱学为材料参数提供了独特的实验途径。在许多情况下，附加信息是通过测量（非线性）光磁化率张量的单独张量元素获得的。分离可能代表完全不同物理性质的不同元素并不总是微不足道的。本文介绍和分析了光谱学中的一些“分离问题”。作为示例案例，我们解决了与界面与体贡献相关的问题（在光学二次谐波产生以及线性方法中，非磁性和磁性系统都适用），以及从磁光谱学中提取真实磁性信息（在静态和时间分辨情况下）。确定了一般机制和实验方法。
Optical spectroscopies provide unique experimental access to materials parameters. In many cases, additional information is obtained by measuring separate tensor elements of the (nonlinear) optical susceptibility tensor. Separation of different elements that may represent completely different physical properties is not always trivial. In this paper a number of ‘separation problems’ in optical spectroscopy are introduced and analyzed. As exemplary cases we address problems associated with interface vs. bulk contributions (in optical second harmonic generation as well as in linear approaches, and both for nonmagnetic and magnetic systems), and the extraction of genuine magnetic information from magneto-optical spectroscopies (both in the static and time-resolved case). Generic mechanisms and experimental approaches are identified.