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Properties and Stability of Nanosecond Optical Limiting of Gold Nanoclusters |
| QU Shi-Liang1,2;FU Shi-You1;LI Hua-Jun1;GENG Yao-Hui1;SONG Ying-Lin3;LIU Shu-Tian3;LI Yu-Liang4;ZHU Cong-Shan2 |
| 1Department of Science, Harbin Institute of Technology at Weihai, Weihai 264209
2Photon Craft Project Laboratory, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
3Department of Physics, Harbin Institute of Technology, Harbin 150001
4Institute of Chemistry, Chinese Academy of Sciences, Beijing
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| Cite this article: |
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QU Shi-Liang, FU Shi-You, LI Hua-Jun et al 2002 Chin. Phys. Lett. 19 1811-1814 |
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Abstract Optical limitation (OL) performances of the gold nanoclusters protected by C60-tpy have been investigated with 8-ns pulses at 532 nm. The experimental results show that the nanocomposite possesses the OL effects superior to C60 in toluene. The main mechanism of OL is attributed to the nonlinear absorption and subsequently induced nonlinear scattering during excitation of the pulse. Ageing of the nanocomposite chloroform solution in air lowers the OL performances by a factor of 2.4, which can be due to the formation of aggregates of large gold particles.
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42.65.Jx
41.20.Jb
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Published: 01 December 2002
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| PACS: |
42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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