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Published on: November 30, 2012
Optical recognition of surface chirality at Au(hkl) single crystalline surfaces by second harmonic generation
Ichizo Yagi1, Masaki Chiba, Kohei Uosaki
1Physical Chemistry Laboratory, Division of Chemistry, Graduate School of Science, Hokkaido University, N10W8 Kita-ku, Sapporo 060-0810, Japan. yagi@pchem.sci.hokudai.ac.jp
Abstract:
Two-dimensional chirality at naturally chiral gold single crystalline surfaces was detected and characterized using optical second harmonic generation (SHG) measurements. SHG rotational anisotropy (SH-RA) patterns at Au(643)S and Au(643)R surfaces were mirror symmetric to each other. Systematic SH-RA measurements at chiral Au(hkl) surfaces with the same step and kink structures but different (111) terrace widths showed a linear correlation between surface step density and SH-RA fitting parameters arising from defects. These results indicate that SH-RA measurements provide information not only on surface chirality but also on density of surface defects.
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