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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/10869
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| タイトル: | Selective observation of local carrier dynamics at step bunches on vicinal TiO_2(110) by time-resolved pump-probe second harmonic generation method |
| 著者: | Takahashi, Hiroaki
Miyauchi, Yoshihiro
Mizutani, Goro |
| キーワード: | step-selective
time-resolved second harmonic generation (SHG)
vicinal TiO2
step bunch
local carrier dynamics |
| 発行日: | 2012-07-26 |
| 出版者: | American Physical Society |
| 誌名: | Physical Review B |
| 巻: | 86 |
| 号: | 4 |
| 開始ページ: | 045447-1 |
| 終了ページ: | 045447-13 |
| DOI: | 10.1103/PhysRevB.86.045447 |
| 抄録: | We report on a step-selective time-resolved second harmonic generation (SHG) method using vicinal TiO_2 (110) with regularly aligned step bunches. The step selectivity was realized by taking advantage of the symmetry-selective properties of second order nonlinear optical processes. In the time-resolved pump-probe SHG measurement, the step bunches displayed a unique temporal response or a sharp spike decaying within ～100 ps, while no decay kinetics was observed for the (110) terraces within a nanosecond. The observed unique local dynamics at the step bunches was attributed to a transient change in their local carrier density. This carrier density change at the step bunches was discussed from the aspect of their local density of states (LDOS) by using step-selective second harmonic and sum frequency generation (SHG/SFG) spectroscopy and density functional theory (DFT) calculation. |
| Rights: | Hiroaki Takahashi, Yoshihiro Miyauchi, and Goro Mizutani, Physical Review B, 86(4), 2012, 045447-1-045447-13. Copyright 2012 by the American Physical Society. http://dx.doi.org/10.1103/PhysRevB.86.045447 |
| URI: | http://hdl.handle.net/10119/10869 |
| 資料タイプ: | publisher |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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| 18621.pdf | | 2175Kb | Adobe PDF | 見る/開く |
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