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Investigation on the phase shifts of extinction and phase gratings in polymethyl methacrylate |
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| Authors: | Wei Li Baiquan Tang Xinzheng Zhang Feng Gao Longchang Liu Qiang Wu Leiting Pan Cibo Lou Shangyu Guo Romano ARupp Jingjun Xu The MOE key Laboratory of Weak-Light Nonlinear Photonics TEDA Applied Physics School Nankai University Tianjin China School of Physics Tianjin China |
| Institution: | Wei Li Baiquan Tang Xinzheng Zhang Feng Gao Longchang Liu Qiang Wu Leiting Pan Cibo Lou Shangyu Guo Romano A.Rupp,, Jingjun Xu 1 The MOE key Laboratory of Weak-Light Nonlinear Photonics,TEDA Applied Physics School,Nankai University,Tianjin 300457,China 2 School of Physics,Tianjin 300071,China |
| Abstract: | The phase shifts of the extinction and refractive index gratings to the illumination pattern are revealed in doped polymethyl methacrylate(PMMA).The dynamic process of these shifts is studied via two-wave coupling at 351 nm.It is shown that these shifts are from the strain and the shrinkage inside the sample and accompanied with the photo-repolymerization process during the building process of the holographic grating.Such shifts will cause obvious energy exchange between the two recording beams and enough a... |
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