doi:10.16186/j.cnki.1673-9787.2019110100

Received:2019/11/27

Revised:2020/06/08

Published:2021/07/15

Physical characters of linear polarization holographic grating inazobenzene-containing bulk polymers

WU Yang1, XING Meishu1, LIN Zhaopei1, DING Yaqian1, ZHANG Ming2

1.No. 23 Research Institude， China Electronics Technology Group Corporation， Shanghai  201900 ， China;2.School of Electronic and Information Engineering， Lanzhou Jiaotong University， Lanzhou  730070 ， Gansu， China

Abstract:In order to increase the diffraction efficiency of linear polarization holographic gratings， the mechanism of linear polarization holographic grating in azobenzene-containing bulk polymer was investigated. The transmission matrix T for the orthogonal linear polarization holographic gratings was derived by Jones matrix. the propagation directions and the intensities of the diffracted waves could be determined from the Fourier transform of T . The functions indicated that the diffraction efficiencies of the first order could be reached to 50% . The temporal changes of the diffraction efficiencies for the 0 order and 1 order of diffracted signals， and the relationship between 1 order of diffracted signal and the polarization were analyzed by using Pump-probe method ，while the azobenzene-containing bulk polymer was under irradiation with two orthogonal linear polarized lights. The experimental results indicated that the diffraction efficiencies for the 0 order and 1 order did not depend on the polarization of the probe beam， the maximum of the diffraction efficiencies for the + 1 order was 33% ， the energies of 0 order and 1 order of diffracted signals could be periodically transferred to each other. Their trends of the temporal change for the diffraction efficiencies of the first order could be fitted by the square of first order Bessel function of the first kind， and the diffraction efficiencies of the ± 1 order diffracted waves were function of angle 2y .

Key words:holographic grating;azobenzene-containing bulk polymer;orthogonal linear polarization;diffraction efficiency

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