Dynamics in disordered materials probed through optical spectra

通过光谱探测无序材料的动力学

• 批准号: 08640417
• 负责人: KANEMATSU Yasuo
• 金额: $ 1.41万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640417/
• 关键词: disorder; glass; resonant fluorescence; dynamics; laser spectroscopy; Raman scattering; ダイナミクス; レーザー

From the resonance fluorescence spectra measured for dye molecules in organic molecular glasses at low temperatures, we determined the density of states of vibrational host modes weighted by the electron-phonon coupling strength for each sample. The normalized shape of this weighted density of states was found to exhibit the quantitatively universal feature which coincides with that obtained for dye-doped organic and inorganic amorphous polymers, though the nature of disorder is widely varied among the materials. Raman scattering spectra were also measured for host glasses at low temperatures. Although the same kind of materials showed similar spectral shapes, remarkable difference was found among the groups of materials. These results indicate crucial importance of classifying types of vibrational modes in order to clarify the low-frequency dynamics of disordered materials and also suggest that a certain class of dynamics shows universality, the origin of which should be clarified in the future study.

从在低温下测量的有机分子玻璃中的染料分子的共振荧光光谱，我们确定了每个样品的电子-声子耦合强度加权的振动主模式的态密度。这种加权态密度的归一化形状被发现表现出定量的普遍特征，这与染料掺杂的有机和无机无定形聚合物所获得的一致，尽管无序的性质在材料中有很大的不同。还测量了基质玻璃在低温下的拉曼散射光谱。虽然同种材料的光谱形状相似，但各组材料之间的光谱形状存在显著差异。这些结果表明，分类的振动模式的类型，以澄清无序材料的低频动力学的至关重要的，也表明，某一类动力学显示出普遍性，其起源应在未来的研究中澄清。

项目成果

兼松 泰男: "Latlice dynamics in disordered materials probed through optical responses" Journal of Luminescence. (1998)

Yasuo Kanematsu：“通过光学响应探测无序材料中的晶格动力学”发光杂志（1998）。

兼松泰男(共著): "Optical Properties of Low-Dimentional Materials Vol.2" World Scientific, 450 (1998)

Yasuo Kanematsu（合著者）：“Optical Properties of Low-Dimensional Materials Vol.2” World Scientific，450 (1998)

兼松 泰男(共著): "Optical Properties of Low-Dimensional Materials Vol.2" World Scientific, 450 (1998)

Yasuo Kanematsu（合著者）：“Optical Properties of Low-Dimensional Materials Vol.2” World Scientific，450（1998）

Yasuo Kanematsu: "Lattice dynamics in disordered materials probed through optical responses" Journal of Laminescence. (in press). (1998)

Yasuo Kanematsu：“通过光学响应探测无序材料中的晶格动力学”层序杂志。

Yasuo Kanematsu: "Lattice dynamics in disordered materials" in "Optical Properties of Low-Dimensional Materials Vol.2" edited by T.Ogawa and Y.Kanematsu. World Scientific, (in press), (1998)

Yasuo Kanematsu：“无序材料中的晶格动力学”，《低维材料的光学性质 Vol.2》，作者：T.Okawa 和 Y.Kanematsu。