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Ultrafast Sources and Physics

机译:超快源与物理

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摘要

Ultrafast relaxation in conjugated polymers are related with the geometrical relaxation due to electron-phonon coupling. This introduces nonlinear excitations such as solitons, polarons, and bipola-rons. In order to obtain the structural information of excited species, time-resolved (TR) vibrational spectroscopies such as TR infrared absorption, TR resonance spontaneous Raman scattering, TR resonance coherent Raman scattering (CARS) have been utilized. However, these methods have serious disadvantages such as low sensitivity, disturbance by spontaneous fluorescence, and interference with nonresonant background.
机译:共轭聚合物中的超快弛豫与由于电子-声子耦合而引起的几何弛豫有关。这引入了非线性激发,例如孤子,极化子和双极子。为了获得激发物质的结构信息,已利用了时间分辨(TR)振动光谱,例如TR红外吸收,TR共振自发拉曼散射,TR共振相干拉曼散射(CARS)。但是,这些方法具有严重的缺点,例如灵敏度低,自发荧光干扰和干扰非共振背景。

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