Heterodyne-detected electronic sum frequency generation: "up" versus "down" alignment of interfacial molecules.
Heterodyne-detected electronic sum frequency generation: "up" versus "down" alignment of interfacial molecules.
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DOI：
10.1063/1.2981179
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发表时间：
2008-09
期刊：
影响因子：
--
通讯作者：
S. Yamaguchi;T. Tahara
中科院分区：
文献类型：
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作者：
S. Yamaguchi;T. Tahara
外差探测电子和频产生（HD-ESFG）光谱技术是新近发展起来的一种用于获得界面复杂电子X（2）谱的新技术，其同时探测带宽大于100 nm。HD-ESFG提供线性卡方（2）光谱，具有界面分子“向上”与“向下”排列的明确信息。对硝基苯胺，非线性光学材料的原型分子，它表明，在空气/熔融石英界面的向上与向下对齐的分子的精细改性的严重影响。
Heterodyne-detected electronic sum frequency generation (HD-ESFG) spectroscopy is newly developed to obtain complex electronic chi(2) spectra of interfaces for a simultaneous detection bandwidth broader than 100 nm. HD-ESFG provides linear chi(2) spectra that have unambiguous information on the "up" versus "down" alignment of interfacial molecules. It is demonstrated for p-nitroaniline, a prototypical molecule of nonlinear optical materials, that the up versus down alignment at an air/fused silica interface is critically influenced by a fine modification of the molecule.