標題: Reflective second harmonic generation from ZnO thin films: A study on the Zn-O bonding
作者: Lo, Kuang Yao
Huang, Yi Jen
Huang, Jung Y.
Feng, Zhe Chuan
光電工程學系
Department of Photonics
公開日期: 16-四月-2007
摘要: The structures of the Zn-O bonding in ZnO (0002) thin films prepared by metal organic chemical vapor deposition have been studied by reflective second harmonic generation (RSHG). The polar Zn-O bond on the top layer is not canceled out and presents 3 mm symmetrical structures on the well-grown ZnO (0002) surface. The average polar strength of the Zn-O bond is correlated with the quality of the ZnO (0002) thin film. The mirror symmetry is caused by the nonvanished polar of twin boundary due to the mismatch between the ZnO film and sapphire substrate and analyzed using s-polarized RSHG with s-polarized fundamental light irradiation. These results demonstrate that the Zn-O heteropolar bonds on the smooth ZnO surface contribute to the SHG intensity. (c) 2007 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2723671
http://hdl.handle.net/11536/10895
ISSN: 0003-6951
DOI: 10.1063/1.2723671
期刊: APPLIED PHYSICS LETTERS
Volume: 90
Issue: 16
結束頁: 
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