Time-Domain Infrared-Visible-Visible Sum-Frequency Generation for Surface Vibrational Spectroscopy

被引：6
|
作者：
Nomoto, Tomonori [1 ]
Onishi, Hiroshi [2 ]
机构：
[1] Kobe Univ, Mol Photosci Res Ctr, Nada Ku, Kobe, Hyogo 6578501, Japan
[2] Kobe Univ, Dept Chem, Grad Sch Sci, Nada Ku, Kobe, Hyogo 6578501, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 52期
关键词：
2ND-HARMONIC GENERATION; RAMAN-SPECTROSCOPY; RUTILE; TIO2; SCATTERING; RADIATION; CONSTANTS; DYNAMICS; MODES; FIELD;
D O I：
10.1021/jp908308t
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We propose a new surface-sensitive, time-domain measurement of low-frequency vibrational coherence. A transverse optical phonon was coherently excited at 180 cm(-1) on a TiO(2) (110) wafer by femtosecond terahertz pulses of the far-infrared region. The probability of second harmonic generation was modulated by the coherent lattice vibrations and probed using visible light pulses. The observable depth was limited as small as 3 nm by tuning the wavelength of the second harmonic light to be resonant with the electronic absorption of TiO(2).
引用
收藏
页码：21467 / 21470
页数：4
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