含偶氮苯聚合物线性偏振全息光栅的物理特性  

Physical characters of linear polarization holographic grating in azobenzene-containing bulk polymers

作　　者：吴洋 邢美术[1] 林兆培 丁亚茜[1] 张明[2] WU Yang;XING Meishu;LIN Zhaopei;DING Yaqian;ZHANG Ming(No.23 Research Institude,China Electronics Technology Group Corporation,Shanghai 201900,China;School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China)

机构地区：[1]中国电子科技集团公司第二十三研究所,上海201900 [2]兰州交通大学电子与信息工程学院,甘肃兰州730070

出　　处：《河南理工大学学报（自然科学版）》2021年第4期141-146,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：甘肃省自然科学基金资助项目(17JR5RA099);兰州交通大学青年基金资助项目(2017004)。

摘　　要：为了提高线性偏振全息光栅的衍射率,对含偶氮苯本体聚合物的线性偏振全息光栅的工作原理进行研究。通过琼斯矩阵推导正交线性偏振全息光栅的传输矩阵T,对传输矩阵进行傅里叶变换,进而得到各阶衍射波的传输方向和信号强度,理论公式表明,其一阶衍射率可达到50%。当含偶氮苯本体聚合物受到2个正交线性偏振光的照射时,通过Pump-probe法分析传输光的零阶和一阶衍射效率的变化规律,以及一阶衍射率和其偏振角之间的关系。实验数据表明,厚度为1 cm的样品在一组正交线性偏振光的照射下,其一阶衍射效率与探测光的偏振态无关,+1端衍射光的最大衍射效率为33%,零阶和一阶衍射光的能量可周期性地相互转移,二者的时域变化趋势符合一阶第一类贝塞尔函数的平方,且传输光的衍射效率为偏振角2γ的函数。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 1order 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 2γ.

关 键 词：全息光栅 偶氮苯本体聚合物 正交线性偏振 衍射效率 

分 类 号：O438.1[机械工程—光学工程]