Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film

doi:10.1088/1674-1056/19/8/084208

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 84208-084208.doi: 10.1088/1674-1056/19/8/084208

Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film

陈桂英¹, 郝召锋², 许京军², 田建国², 张春平², 陆文强³

(1)Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (2)Photonic Center, School of Physics, Nankai University, Tianjin 300072, China; (3)Physics Experimental Teaching Center, School of Physics, Nankai University, Tianjin 300071, China

收稿日期:2009-11-02 修回日期:2010-01-30 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10774152), the Science and Technology Foundation of Guangzhou City, China (Grant No. 2008J1-C021), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070055103).

Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film

Lu Wen-Qiang(陆文强)^a), Chen Gui-Ying(陈桂英)^b)^†, Hao Zhao-Feng(郝召锋)^c), Xu Jing-Jun(许京军)^c),Tian Jian-Guo(田建国)^c), and Zhang Chun-Ping(张春平)^c)

^a Physics Experimental Teaching Center, School of Physics, Nankai University, Tianjin 300071, China; ^b Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; ^c Photonic Center, School of Physics, Nankai University, Tianjin 300072, China

Received:2009-11-02 Revised:2010-01-30 Online:2010-08-15 Published:2010-08-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10774152), the Science and Technology Foundation of Guangzhou City, China (Grant No. 2008J1-C021), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070055103).

摘要/Abstract

摘要： The polymethyl methacrylate (PMMA) film doped with an azo dye ethyl-red (ER) film is employed to demonstrate the properties of an all-optical switch by its photoinduced dichroism and birefringence. We show how to enhance remarkably the modulation depth of all-optical switches almost to 100% by using two linear polarization beams: one beam is inclined at 45o with respect to the probing beam and serves as a pumping beam, and the other beam is perpendicular to the probing beam and used as an erasing beam. Furthermore, a maximum-to-minimum output intensity ratio of 2000:1 is achieved in experiment, which is very useful and important for optical storages and image displays.

Abstract: The polymethyl methacrylate (PMMA) film doped with an azo dye ethyl-red (ER) film is employed to demonstrate the properties of an all-optical switch by its photoinduced dichroism and birefringence. We show how to enhance remarkably the modulation depth of all-optical switches almost to 100% by using two linear polarization beams: one beam is inclined at 45$^\circ$ with respect to the probing beam and serves as a pumping beam, and the other beam is perpendicular to the probing beam and used as an erasing beam. Furthermore, a maximum-to-minimum output intensity ratio of 2000:1 is achieved in experiment, which is very useful and important for optical storages and image displays.

Key words: all-optical switch, azo dye ethyl-red, modulation depth

中图分类号: (Optical computers, logic elements, interconnects, switches; neural networks)

42.79.Ta

42.60.Fc (Modulation, tuning, and mode locking) 42.79.Kr (Display devices, liquid-crystal devices) 42.79.Vb (Optical storage systems, optical disks) 78.20.Fm (Birefringence)

陆文强, 陈桂英, 郝召锋, 许京军, 田建国, 张春平. Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film[J]. 中国物理B, 2010, 19(8): 84208-084208.

Lu Wen-Qiang(陆文强), Chen Gui-Ying(陈桂英), Hao Zhao-Feng(郝召锋), Xu Jing-Jun(许京军),Tian Jian-Guo(田建国), and Zhang Chun-Ping(张春平). Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film[J]. Chin. Phys. B, 2010, 19(8): 84208-084208.

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Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film

Enhancement of modulation depth of an all-optical switch using an azo dye-ethyl red film

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