| Original Articles |
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Photoinduced Birefringence and Broadband All-Optical Photonic Switch in a Bacteriorhodopsin/Polymer Composite Film |
WEI Lai1;TENG Xue-Lei1;LU Ming1;ZHAO You-Yuan1;MA De-Wang2;DING Jian-Dong2 |
| 1State Key Laboratory for Advanced Photonic Materials and Devices, and Department of Optical Science and Engineering, Fudan University, Shanghai 2004332Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433 |
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| Cite this article: |
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WEI Lai, TENG Xue-Lei, LU Ming et al 2007 Chin. Phys. Lett. 24 3416-3419 |
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Abstract Photoinduced birefringence with large optical nonlinearity in a bacteriorhodopsin/polymer composite film is observed. A high refractive index change of 8.5×10-5 photoinduced by 476nm pumping beam is reached at the low intensity of 6.5mW/cm2. Based on it, a broadband all-optical photonic
switch is realized with an optical controlling switch system. Because of controlling beam's selectivity in switching, the transporting beams of different wavelengths with different intensities and shapes can be modulated by adjusting the wavelength and intensity of the controlling beam.
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| Keywords:
42.25.Lc
42.70.Gi
42.79.Ta
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Received: 05 May 2007
Published: 03 December 2007
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| PACS: |
42.25.Lc
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(Birefringence)
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42.70.Gi
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(Light-sensitive materials)
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42.79.Ta
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(Optical computers, logic elements, interconnects, switches; neural networks)
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