Cheng Xiaoman, Yao Suwei. Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 597-601. doi: 10.1088/1674-0068/17/5/597-601
Citation: Cheng Xiaoman, Yao Suwei. Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 597-601. doi: 10.1088/1674-0068/17/5/597-601

Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface

doi: 10.1088/1674-0068/17/5/597-601
Funds:  Project supported by the Associated Foundation of Naikai University-Tianjin University of the Education Ministry of China; Key Teachers Foundation of the Education Ministry of China (2000-65),and the Key Discipline of Material Physics & Chemistry in Tianj
  • Received Date: 2004-03-26
  • Using the Kelvin probe and the optical second harmonic generation (SHG) measurement, the Space charged phenomenon and the non-linear optical effects at the interfaces of the coppertetra-tert-butyl phthalocyanine (CuttbPc) Langmuir-Blodgett (LB) film deposited on a metal (AlorAu) coated glass slide substrate were in vestigated. The surface potentials decreaseas the film thickness increases and eventually approaches a saturated value. The SHG has been detected although there is a centro-symmetric systemin the Cuttb Pcmolecular, and avery strong SH signal can be investigated at 1260 nm band for Cuttb Pc/Al samples. According to a proposed physical model for Cuttb PcLB film/metal, the nonlinear mechanism were analyzed by using electromagnetic wave theory. It is considered that the enhanced SH peak of CuttbPc/Al is attributed to the strong surface potential aroused by SCIEF at the interface, and shows that the production of SH signal is correlated closely with the electrostatic phenomena at the interface.
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Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface

doi: 10.1088/1674-0068/17/5/597-601
Funds:  Project supported by the Associated Foundation of Naikai University-Tianjin University of the Education Ministry of China; Key Teachers Foundation of the Education Ministry of China (2000-65),and the Key Discipline of Material Physics & Chemistry in Tianj

Abstract: Using the Kelvin probe and the optical second harmonic generation (SHG) measurement, the Space charged phenomenon and the non-linear optical effects at the interfaces of the coppertetra-tert-butyl phthalocyanine (CuttbPc) Langmuir-Blodgett (LB) film deposited on a metal (AlorAu) coated glass slide substrate were in vestigated. The surface potentials decreaseas the film thickness increases and eventually approaches a saturated value. The SHG has been detected although there is a centro-symmetric systemin the Cuttb Pcmolecular, and avery strong SH signal can be investigated at 1260 nm band for Cuttb Pc/Al samples. According to a proposed physical model for Cuttb PcLB film/metal, the nonlinear mechanism were analyzed by using electromagnetic wave theory. It is considered that the enhanced SH peak of CuttbPc/Al is attributed to the strong surface potential aroused by SCIEF at the interface, and shows that the production of SH signal is correlated closely with the electrostatic phenomena at the interface.

Cheng Xiaoman, Yao Suwei. Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 597-601. doi: 10.1088/1674-0068/17/5/597-601
Citation: Cheng Xiaoman, Yao Suwei. Analysis of the Surface Potentials and the Characters of Optical Second Harmonic Generation at the CuttbPc LB Film/Metal Interface[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 597-601. doi: 10.1088/1674-0068/17/5/597-601

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