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All-optical continuous-tunable image switch based on nonlinear photoinduced anisotropy in bacteriorhodopsin film |
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| Authors: | Guiying Chen Xiaodong Shang ZhaoFeng Hao Xuxu Xu Q.W. Song |
| Affiliation: | a Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China b The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, China c Nankai University, Tianjin 300457, China d Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, NY 13224-1240, USA |
| Abstract: | Using nonlinear photoinduced anisotropy in bacteriorhodopsin (bR) film, we presented and demonstrated an image switch in which the output can be tuned continuously by the intensity of a pumping beam. A laser with wavelength 532 nm was used as the pumping beam, and a He-Ne laser at wavelength 632.8 nm was used as the probe beam. Without pumping light, a little of polarized probe beam can transmit the crossed polarizers and the output is very low. With the presence of pumping light, owing to photoinduced anisotropy in the bR film, a portion of the probe beam transmits the crossed polarizers, depending on the intensity of the pumping beam. For the low-intensity probe beam (0.44 mW/cm2), the output is dependent on a wide range of pumping beam (2-30 mW/cm2). On the contrary, for the high-intensity probe beam (0.80 mW/cm2), the output is dependent on a narrow range of pumping beam (2-7 mW/cm2). |
| Keywords: | 42.30Va 42.65Sf |
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