| Original Articles |
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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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| Cite this article: |
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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.
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| Keywords:
42.65.Hw
42.70.Jk
41.20.Jb
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Published: 01 July 2003
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.70.Jk
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(Polymers and organics)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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