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首页> 外文期刊>Optical materials >Spodumene, alpha-LiAlSi2O6 - A new natural SRS-active crystal with three chi((3))-promoting vibrational modes
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Spodumene, alpha-LiAlSi2O6 - A new natural SRS-active crystal with three chi((3))-promoting vibrational modes

机译：锂辉石，alpha-LiAlSi2O6 - 一种新的天然SRS活性晶体，具有三种促进气（（3））的振动模式

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摘要

alpha-LiAlSi2O6, known as mineral spodumene, is introduced as a novel SRS-active crystal with monoclinic symmetry C2/c. Under picosecond laser excitation Raman-induced steady-state chi((3))-nonlinear generation in the visible and near-IR is observed in the crystals. All recorded Stokes and anti-Stokes high-order lasing components are identified and correspond to three SRS-promoting phonon modes with omega(SRS1) approximate to 709 cm(-1), omega(RSR2) approximate to 357 cm(-1) and omega(SRS3) approximate to 1074 cm(-1). On the basis of the results of a spontaneous Raman scattering study they were assigned to vibrations of the tetrahedral SiO4 groups of the silicate chains and lattice modes of Li-O or Al-O of the crystal structure. A brief review in tabular form of so far known SRS-active natural crystals (minerals) is given as well. (C) 2018 Elsevier B.V. All rights reserved.
机译：alpha-LiAlSi2O6，被称为矿物锂辉石，是一种具有单斜对称性C2/c的新型SRS活性晶体。在皮秒激光激发下，在晶体中观察到拉曼诱导的可见光和近红外稳态chi（（3））非线性生成。所有记录的Stokes和反Stokes高阶激光分量均被识别出来，并对应于三种促进SRS的声子模式，其中omega（SRS1）约为709 cm（-1），omega（RSR2）约为357 cm（-1），omega（SRS3）约为1074 cm（-1）。根据自发拉曼散射研究的结果，它们被分配给硅酸盐链的四面体[SiO4]基团的振动和晶体结构的Li-O或Al-O的晶格模式。还以表格形式简要回顾了迄今为止已知的SRS活性天然晶体（矿物）。（C） 2018 Elsevier B.V.保留所有权利。

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