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Femtosecond Studies on Third-Order Optical Nonlinearities of Polyanilines |
| WANG Hui;LAI Tianshu;LIN Weizhu;MO Dang;OUYANG Meng*;GONG Kecheng* |
| Department of Physics, Zhongshan University, Guangzhou 510275
*Department of Polymer, South China University of Technology, Guangzhou 510641 |
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| Cite this article: |
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WANG Hui, LAI Tianshu, LIN Weizhu et al 1994 Chin. Phys. Lett. 11 491-493 |
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Abstract The ultrafast dynamics of third order nonlinearities of polyaniline (PAn) and polyaniline doped in polymethyl mathacrylate (PAn-PMMA) films are investigated using femtosecond absorption spectroscopy. An ultrafast initial exciton deformation time of about 100fs is observed in PAn film. In PAn-PMMA film, the third-order nonlinearity results in an efficient two-photon absorption at about 2eV.
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| Keywords:
42.65.-k
42.65.Re
42.70.-a
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Published: 01 August 1994
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| PACS: |
42.65.-k
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(Nonlinear optics)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.70.-a
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(Optical materials)
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