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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
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).
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页码:21467 / 21470
页数:4
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