Photoinduced Birefringence and Broadband All-Optical Photonic Switch in a Bacteriorhodopsin/Polymer Composite Film

Photoinduced birefringence with large optical nonlinearity in a bacteriorhodopsin/polymer composite film is observed. A high refractive index change of 8.5 X 10-5 photoinduced by 476 nm pumping beam is reached at the low intensity of 6.5 mW/cm2. Based on it, a broadband all-optical photonic switch i...

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Published inChinese physics letters Vol. 24; no. 12; pp. 3416 - 3419
Main Authors Lai, Wei, Xue-Lei, Teng, Ming, Lu, You-Yuan, Zhao, De-Wang, Ma, Jian-Dong, Ding
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2007
Subjects
Bacteria
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Summary:Photoinduced birefringence with large optical nonlinearity in a bacteriorhodopsin/polymer composite film is observed. A high refractive index change of 8.5 X 10-5 photoinduced by 476 nm pumping beam is reached at the low intensity of 6.5 mW/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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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/24/12/035