Chin. Phys. Lett.  1995, Vol. 12 Issue (12): 735-738    DOI:
Original Articles |
Large Stable Photoinduced Anisotropy and Optical Information Storage in Poly [4-bis (N, N-oxyethylene) imino-4- nitroasobenzene Succinyl] Film by Two-Wave Mixing
WEI Xiong;YAN Xingzhong1;LIN Weizhu;MO Dang;LIANG Zhaoxi2
Department of Physics, ZhongShan university, Guangzhou 510275 1State Key Laboratory of Ultrafast Laser Spectroscopy, ZhongShan University, Guangzhou 510275 2Institute of Polymer Science, ZhongShan University, Guangzhou 510275
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WEI Xiong, YAN Xingzhong, LIN Weizhu et al  1995 Chin. Phys. Lett. 12 735-738
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Abstract Optical information storage caused by photoinduced anisotropy in poly [4'-bis (N, N-oxyethylene) imino-4-nitroazobenzene succinyl] film is studied by two-wave mixing. Using Nd:YAG second-harmonic pulses (100ps), grating of orientation of azobenzene molecules is formed in the film by photoinduced anisotropy. Up to third-order diffraction was observed. After turning off one of the two pump lights, the signals remained. When the weaker one of two pump lights was turned off, the intensities of diffraction beams of another pump light almost did not decrease. The information recorded in the film can be 100% maintained for a long time (monitored over 100 days without obvious decrease).

Keywords: 42.70.Ln      42.65.Hw. 42.40.Lx     
Published: 01 December 1995
PACS:  42.70.Ln (Holographic recording materials; optical storage media)  
  42.65.Hw. 42.40.Lx  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1995/V12/I12/0735
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WEI Xiong
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LIANG Zhaoxi
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