| Original Articles |
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Large Enhancement of Optical Nonlinearities of New Organophosphorus Fullerene Derivative
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| LIU Zhi-Bo1;TIAN Jian-Guo1;ZANG Wei-Ping1;ZHOU Wen-Yuan1;ZHANG Chun-Ping1;ZHENG Jian-Yu2;ZHOU Ying-Chun2;XU Hua2 |
| 1Photonics Center, College of Physics, Nankai University, Tianjin 300071
2College of Chemistry, Nankai University, Tianjin 300071 |
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| Cite this article: |
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LIU Zhi-Bo, TIAN Jian-Guo, ZANG Wei-Ping et al 2003 Chin. Phys. Lett. 20 1744-1747 |
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Abstract Optical nonlinearities of new organophosphorus fullerene derivative were determined by the Z-scan method with a pulsed Q-switch Nd:YAG laser at 532 nm. The experimental results demonstrated that the derivative has much larger excited-states nonlinear absorption and nonlinear refraction than C60. A five-level model was utilized to fit the experiemntal data, and a good agreement is reached. Some parameters such as excited-state absorption cross and refraction cross were obtained. To our knowledge, the excited-state cross section of new organophosphorus fullerene derivative and its effective ratio to the ground-state cross section are the largest values among the fullerene derivatives reported to date.
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| Keywords:
42.65.-k
61.48.+c
42.65.Jx
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Published: 01 October 2003
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| PACS: |
42.65.-k
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(Nonlinear optics)
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61.48.+c
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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