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Femtosecond Optical Kerr Effect of Surface Modified PbS Nanocrystals |
| AI Xi-cheng;JIN Rong;WANG Jing-jing;XIA Zong-ju;ZOU Ying-hua;GUO Lin1;LI Qian-shu1;ZHU He-sun1 |
| Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871
1College of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081
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| Cite this article: |
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AI Xi-cheng, JIN Rong, WANG Jing-jing et al 1998 Chin. Phys. Lett. 15 192-194 |
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Abstract Surface modified PbS nanocrystals were fabricated by a novel method and their ultrafast optical nonlinearity was studied by the femtosecond time-resolved optical Kerr effect. A large nonlinear effect (x(3)~ 5 ×10-12 esu) with a laser pulse limited response was observed. This may be attributed to the reduction of surface trapped electrons due to the surface modification.
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| Keywords:
42.65.An
42.65.Re
78.66.Jg
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Published: 01 March 1998
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| PACS: |
42.65.An
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(Optical susceptibility, hyperpolarizability)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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78.66.Jg
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(Amorphous semiconductors; glasses)
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