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Title
Japanese: 
English:Second harmonic generation in self-assembled ZnO microcrystallite thin films 
Author
Japanese: 張 希清, 湯 子康, 川崎 雅司, 大友 明, 鯉沼 秀臣.  
English: X. Q. Zhang, Z. K. Tang, M. Kawasaki, A. Ohtomo, H. Koinuma.  
Language English 
Journal/Book name
Japanese: 
English:Thin Solid Films 
Volume, Number, Page Vol. 450    No. 2    pp. 320-323
Published date Mar. 2004 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL <Go to ISI>://000220442100015
 
DOI https://doi.org/10.1016/j.tsf.2003.11.225
Abstract The second-order non-linear susceptibility components were measured using 1.064 mum incident light for ZnO thin films of various thicknesses from 24.4 to 283 nm self-assembled on sapphire substrates by laser molecular beam epitaxy. It was found that the values of the non-linear susceptibility for the films are almost the same as those of bulk material, except the samples with thicknesses ranging from 35 to 64.8 nm, which show a large enhancement effect. For the sample with a thickness of 44.4 nm, the second-order non-linear susceptibility components were found to be approximately 14.7 pm/v for d(31), 15.2 pm/v for d(15), and -83.7 pm/v, a value approximately 14 times that of the bulk material, for d(33). The second-order non-linear coefficient enhancement in the thin films may be resulted from the microcrystallite structures.

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