Chin. Phys. Lett.  2003, Vol. 20 Issue (7): 1070-1073    DOI:
Original Articles |
Enhanced Nonlinear Absorption and Optical Limiting Properties of Organic Material ZnTBP-CA-PhR in a DA-ET System
YU Shi-Rui;ZHAO You-Yuan;LI Lu-Ying
Department of Optical Science and Engineering, State Key Laboratory of Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433
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YU Shi-Rui, ZHAO You-Yuan, LI Lu-Ying 2003 Chin. Phys. Lett. 20 1070-1073
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Abstract Nonlinear absorption of the organic material Zn-tetrabenzoporphin-crotonicacid-phenoxy resin (ZnTBP-CA-PhR) in the donor-acceptor energy-transfer (DA-ET) system is investigated by the irradiation of Ar+ laser on its solid film. A reverse saturable absorption and an enhanced second reverse saturable absorption called the re-reverse saturable absorption are observed in a visible wavelength range. The high performance of optical limiting of the sample possessing low input threshold and an over 95% linear transmission ratio are observed. The physical mechanism of re-reverse saturable absorption is analysed by a five-level rate-equation simulating. According to the Huygens wave diffraction principle and the combination of Kerr effect, thermo-optic effect and optical absorption variation, a mathematical model for the optical limiting of ZnTBP-CA-PhR film limiter is established and the theoretical simulating gives a good agreement with the experimental results.

Keywords: 42.65.Hw      42.70.Jk      41.20.Jb     
Published: 01 July 2003
PACS:  42.65.Hw (Phase conjugation; photorefractive and Kerr effects)  
  42.70.Jk (Polymers and organics)  
  41.20.Jb (Electromagnetic wave propagation; radiowave propagation)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I7/01070
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