Analysis of Second-Harmonic Generation from CuttbPc LB Film/Metal Interface |
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引用本文: | 程晓曼,姚素薇,李成全,间中孝彰,岩本光正.Analysis of Second-Harmonic Generation from CuttbPc LB Film/Metal Interface[J].中国物理快报,2004,21(1):153-155. |
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作者姓名: | 程晓曼 姚素薇 李成全 间中孝彰 岩本光正 |
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作者单位: | [1]SchoolofChemicalEngineeringandTechnology,TianjinUniversity,Tianjin300072 [2]DepartmentofPhysicalElectronics,TokyoInstituteofTechnology,Tokyo152-8552,Japan |
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摘 要: | Second-harmonic generation signals from a CuttbPc LB film deposited on metal (Al or Au)-glass substrates were investigated. It was observed that there were two second-harmonic peaks at the wavelength of 1060 and 1250nm in the CuttbPc/Al film, but only one peak at 1050nm in the CuttbPc/Au film. Meanwhile the surface electric potentials (SEP) at the interfaces of LB film/metals were also measured using a Kelvin probe. The SEP in the CuttbPc/Al decreases and eventually approaches a saturated value of -1.0V as the film thickness increases, while the SEP in the CuttbPc/Au is nearly zero. Based on the experimental results and theoretical analysis, it was considered that the space-charge-induced electric field makes a main contribution to the second-harmonic generation at 1250nm in the CuttbPc/Al film.
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关 键 词: | 次谐波振荡信号 CuttbPc LB薄膜/金属界面 非线性光学 SHG 酞菁 |
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