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Selective measurement of the electronic states of the steps on rutile TiO 2 (15 15 4) surface by optical second harmonic spectroscopy
Author(s) -
Takahashi Hiroaki,
Watanabe Ryosuke,
Mizutani Goro
Publication year - 2010
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3589
Subject(s) - rutile , formic acid , second harmonic generation , spectroscopy , spectral line , surface states , chemistry , polarization (electrochemistry) , photon energy , adsorption , analytical chemistry (journal) , harmonic , atomic physics , optics , photon , materials science , laser , physics , surface (topology) , organic chemistry , chromatography , quantum mechanics , astronomy , geometry , mathematics
We have obtained optical second harmonic spectra of stepped rutile TiO 2 (15 15 4) adsorbed with formic acid HCOOH. We have achieved selective measurement of the electronic states of the bunched steps on this surface in an optical configuration with nearly normal incident laser illumination. For the polarization combinations S in‐S out and P in‐S out, the SH intensity was higher near the second harmonic photon energy 3.6 eV and also above 4.45 eV. The terraces and steps were found to show remarkably different contributions to the optical second harmonic spectra at 45° incidence. Copyright © 2010 John Wiley & Sons, Ltd.