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Dark diffusional enhancement of holographic multiplexed gratings in phenanthrenequinone doped poly(methyl methacrylate) photopolymer |
Yu Dan(于丹)a), Wang Heng (王珩)a), Liu Hong-Peng(刘鸿鹏)b), Wang Jian(王健)a), Jiang Yong-Yuan(姜永远)a), and Sun Xiu-Dong(孙秀冬)a)† |
a Department of Physics, Harbin Institute of Technology, Harbin 150001, China; b College of Science, Civil Aviation University of China, Tianjin 300300, China |
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Abstract In this paper, we experimentally investigate the dark diffusional enhancement of the optimized multiplexed grating in the phenanthrenequinone doped poly (methyl methacrylate) (PQ-PMMA) photopolymer. The possibility of improving the holographic characteristics of the material through the dark enhancement is demonstrated. The optimal preillumination exposure and the optimal time interval between exposures are extracted to obtain the optimized diffraction efficiency, and their values are 3.4×103 mJ/cm2 and 2 min, respectively. The dark enhancement of the multiplexed grating is presented as an effective method to improve the response region and the dynamic range and to prevent saturation of the material. The dependence of the phenanthrenequinone concentration on the increment of the refractive index modulation is quantitatively studied, which provides a significant basis for improving the homogeneity in the multiplexed gratings using a quantitative strategy. Finally, a simple experimental procedure using the dark enhancement is introduced to improve the homogeneity of the diffraction efficiency and to avoid the complex schedule exposure.
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Received: 19 April 2011
Revised: 12 May 2011
Accepted manuscript online:
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PACS:
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42.70.Ln
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(Holographic recording materials; optical storage media)
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42.70.Jk
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(Polymers and organics)
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42.40.Ht
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(Hologram recording and readout methods)
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Fund: Project supported by the National Basic Research Program of China (Grant No. 2007CB3070001), the Fundamental Research
Funds for the Central Universities, China (Grant No. HIT. NSRIF. 2010009), the Program of Excellent Team in Harbin Institute
of Technology, China, and the Research Startup Foundation of Civil Aviation University of China (Grant No. 2010QN03X). |
Cite this article:
Yu Dan(于丹), Wang Heng (王珩), Liu Hong-Peng(刘鸿鹏), Wang Jian(王健), Jiang Yong-Yuan(姜永远), and Sun Xiu-Dong(孙秀冬) Dark diffusional enhancement of holographic multiplexed gratings in phenanthrenequinone doped poly(methyl methacrylate) photopolymer 2011 Chin. Phys. B 20 114217
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