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All-Optical Switching Based on Azo Polymer Material |
| DENG Yan1;LUO Yan-Hua2;WANG Pei1;LU Yong-Hua1;MING Hai1,ZhANG Qi-Jing2 |
| 1Institute of Photonics, University of Science and Technology of China, Hefei 2300262Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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DENG Yan, LUO Yan-Hua, WANG Pei et al 2007 Chin. Phys. Lett. 24 2849-2851 |
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Abstract Conventional all-optical switches based on azo polymer films and the all-optical switches based on the attenuated total reflection (ATR) geometry are investigated. A conventional switch system, including a pump beam of 532nm and a probe beam of 650nm, is based on the photoinduced birefringence effect of azo polymer. An ATR switch in a prism-multilayer configuration is achieved by changing the reflectance of the probe beam with an external pump beam. The ATR method provides the substantial improvement of the speed and the efficiency of the modulation over the conventional method. Although the azo polymer response still remains relatively slow, an enhanced nonlinear refractive index of the azo polymer film can effectively increase the
modulation.
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| Keywords:
42.65.Pc
42.70.-a
78.66.Qn
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Received: 15 June 2007
Published: 20 September 2007
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| PACS: |
42.65.Pc
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(Optical bistability, multistability, and switching, including local field effects)
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42.70.-a
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(Optical materials)
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78.66.Qn
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(Polymers; organic compounds)
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