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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/9075

Title: Optical Second Harmonic Generation from Periodic Steps on Rutile TiO_2(110)
Authors: Takahashi, Hiroaki
Watanabe, Ryosuke
Mizutani, Goro
Keywords: Second harmonic generation methods
Titanium oxide
High index single crystal surfaces
Stepped single crystal
Issue Date: 2010-02-27
Publisher: The Surface Science Society of Japan
Magazine name: e-Journal of Surface Science and Nanotechnology
Volume: 8
Start page: 84
End page: 88
DOI: 10.1380/ejssnt.2010.84
Abstract: We have succeeded in observing optical second harmonic generation (SHG) from steps on the TiO_2 surfacesadsorbed with HCOOH. The samples were single crystals of rutile TiO_2 with (110), (15 15 4), (13 9 0), and (671)faces. These samples underwent annealing in O_2 gas, HF etching, and immersion into HCOOH aqueous solution toadsorb HCOOH molecules on their surfaces. Their surfaces were characterized by reflection high energy electrondiffraction (RHEED) and atomic force microscopy (AFM), and were confirmed to have regularly aligned stepscreated by the miscut of the samples. SH intensity as a function of the sample rotation angle was measured inair with the incident angle of 2° at the SH photon energy of 2ω = 4.66 eV. The SH intensity from the surfaceswith steps were 2 to 3 orders of magnitude stronger than that from the (110) surface. The SH intensity patternsfrom these stepped surfaces were anisotropic. The result indicates that the contribution of the surface steps wasobserved selectively.
Rights: Copyright (C) 2010 The Surface Science Society of Japan. Hiroaki Takahashi, Ryosuke Watanabe, and Goro Mizutani, e-Journal of Surface Science and Nanotechnology, 8, 2010, 84-88. http://dx.doi.org/10.1380/ejssnt.2010.84
URI: http://hdl.handle.net/10119/9075
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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