| Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal |
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| 引用本文： | 金朝辉 李忠玉 KASATANI Kazuo OKAMOTO Hiroaki. Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal[J]. 中国物理快报, 2006, 23(10): 2786-2789 |
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| 作者姓名： | 金朝辉 李忠玉 KASATANI Kazuo OKAMOTO Hiroaki |
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| 作者单位： | Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan |
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| 基金项目： | Supported by the Venture Busin,ess Laboratory, Yamaguchi University. |
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| 摘 要： | A cyanine dye, 2-[7-（1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene）-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indolium iodide （NK-125）, is doped in 4-cyano-4＇-pentylbiphenyl （5 CB）, and the mixture is sandwiched between two pieces of rubbed glass plates. The third-order nonlinear optical properties of the oriented NK-125-SCB layers are measured by the resonant femtosecond degenerate four-wave mixing （DFWM） technique at 760 nm. The third-order nonlinear optical susceptibility of one of the present samples is 5.5×10^-8 esu. The slow DFWM response of the NK-125-SCB layers due to a population grating is accelerated by the increasing laser power because of amplified spontaneous emission （ASE）. On the other hand, we do not observe a similar phenomenon for NK-125- polyethylene glycol （PEG-400）. Oriented NK-125 molecules in nematic liquid crystals must have very high ASE efficiency. Hence the population grating in a DFWM signal disappears within about 4 ps. It is expected that NK-125-SCB can be used as a material for very fast all-optical switching.
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| 关 键 词： | 快速光开光 液晶 非线性光学 DFWM信号 |
| 收稿时间： | 2006-02-13 |
| 修稿时间： | 2006-02-13 |
Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal |
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| JIN Zhao-Hui, LI Zhong-Yu, KASATANI Kazuo, OKAMOTO Hiroaki. Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal[J]. Chinese Physics Letters, 2006, 23(10): 2786-2789 |
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| Authors: | JIN Zhao-Hui LI Zhong-Yu KASATANI Kazuo OKAMOTO Hiroaki |
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