| Femtosecond Third-Order Optical Nonlinearity of Au：Bi203 Nanocomposite Films |
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| 引用本文： | 游冠军,周鹏,董志伟,张春峰,陈良尧,钱士雄.Femtosecond Third-Order Optical Nonlinearity of Au：Bi203 Nanocomposite Films[J].中国物理快报,2007,24(3):730-733. |
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| 作者姓名： | 游冠军 周鹏 董志伟 张春峰 陈良尧 钱士雄 |
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| 作者单位： | [1]Department of Physics, Fudan University, Shanghai 200433 [2]State Key Lab for Surface Physics, Fudan University, Shanghai 200433 [3]School of Microelectronics, State Key Lab of ASIC and Systems, Fudan University, Shanghai 200433 [4]Department of Optical Science and Engineering, Fudan University, Shanghai 200433 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10374020 and 10674031. |
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| 摘 要： | Ultrafast third-order optical nonlinearities of the as-deposited and annealed Au：Bi2O3 nanocomposite films deposited by magnetron cosputtering are investigated by using femtosecond time-resolved optical Kerr effect （OKE） and pump probe techniques. The third-order optical nonlinear susceptibility is estimated to be 2.6Ф×10^- 10 esu and 1.8 × 10.9 esu at wavelength of 800nm, for the as-deposited and the annealed film, respectively. The OKE signal of the as-deposited film is nearly temporally symmetrical with a peak centred at zero delay time, which indicates the dominant contribution from intraband transition of conduction electrons. For the annealed film, the existence of a decay process in OKE signal implies the important contribution of hot electrons. These characteristics are in agreement with the hot electron dynamics observed in pump probe measurement.
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| 关 键 词： | 光学 非线性特征 磁控管热丝 温度 |
| 收稿时间： | 2006-9-12 |
| 修稿时间： | 2006-09-12 |
Femtosecond Third-Order Optical Nonlinearity of Au:Bi2O3 Nanocomposite Films |
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| YOU Guan-Jun,ZHOU Peng,DONG Zhi-Wei,ZHANG Chun-Feng,CHEN Liang-Yao,QIAN Shi-Xiong.Femtosecond Third-Order Optical Nonlinearity of Au:Bi2O3 Nanocomposite Films[J].Chinese Physics Letters,2007,24(3):730-733. |
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| Authors: | YOU Guan-Jun ZHOU Peng DONG Zhi-Wei ZHANG Chun-Feng CHEN Liang-Yao QIAN Shi-Xiong |
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| Institution: | 1 Department of Physics, Fudan University3, Shanghai 200433 ; 2 State Key Lab for Surface Physics, Fudan University, Shanghai 200433 ;3School of Microelectronics, State Key Lab of ASIC and Systems, Fudan University, Shanghai 200433; 4.Department of Optical Science and Engineering, Fudan University; Shanghai 200433 |
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| Abstract: | Ultrafast third-order optical nonlinearities of the as-deposited and annealed Au:Bi2O3 nanocomposite films deposited by magnetron cosputtering are investigated by using femtosecond time-resolved optical Kerr effect (OKE) and pump--probe techniques. The third-order optical nonlinear susceptibility is estimated to be 2.6×10-10 esu and 1.8×10-9 esu at wavelength of 800nm, for the as-deposited and the annealed film, respectively. The OKE signal of the as-deposited film is nearly temporally symmetrical with a peak centred at zero delay time, which indicates the dominant contribution from intraband transition of conduction electrons. For the annealed film, the existence of a decay process in OKE signal implies the important contribution of hot electrons. These characteristics are in agreement with the hot electron dynamics observed in pump--probe measurement. |
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| Keywords: | 42 65 Re 42 70 Nq 78 67 Bf |
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