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

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...

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Bibliographic Details
Published in:Chinese physics B 2010-08, Vol.19 (8), p.429-436
Main Author: 陆文强 陈桂英 郝召锋 许京军 田建国 张春平
Format: Article
Language:English
Subjects:
Azo
Beams (radiation)
Birefringence
Dyes
Modulation
Polymethyl methacrylates
Switches
乙基红
偶氮染料
全光开关
垂直探测
有机玻璃
聚甲基丙烯酸甲酯
调制深度
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Summary: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° 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.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/8/084208