2.3拉曼散射

International Tables for Crystallography Pub Date : 2013-12-19 DOI:10.1107/97809553602060000913

I. Gregora

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摘要

拉曼散射是由于光子在分子、液体或固体中受激发而产生的非弹性散射。本章专门讨论晶体中晶格振动(声子)对光子的非弹性散射，但这种处理也适用于晶体中其他类型的集体激发。第一节介绍了基本概念。然后描述声子的一阶散射。表格总结了32种晶体学类中拉曼张量的对称性。进一步讨论拉曼散射中的形态效应、空间色散效应和高阶散射。关键词:拉曼活性;拉曼散射;拉曼谱线形状;拉曼张量;分散;非弹性散射;纵向光学模式;形态学的影响;光学模式;声子带;拉曼散射截面;选择规则;易感性衍生品

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2.3 Raman scattering

Raman scattering is due to the inelastic scattering of photons by excitations in molecules, liquids or solids. This chapter deals specifically with the inelastic scattering of photons by lattice vibrations (phonons) in crystals, but the treatment is also applicable to other types of collective excitations in a crystal. The basic notions are introduced in the first section. First-order scattering by phonons is then described. A table summarizes the symmetry properties of Raman tensors in the 32 crystallographic classes. Further sections discuss morphic effects in Raman scattering, spatial-dispersion effects and higher-order scattering. Keywords: Raman activity; Raman scattering; Raman spectral line shape; Raman tensor; dispersion; inelastic scattering; longitudinal optic mode; morphic effects; optic modes; phonon bands; Raman scattering cross section; selection rules; susceptibility derivatives

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International Tables for Crystallography

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