交叉相位引致艾里-厄米-高斯光束在单轴晶体传输时光斑连续转动  

Continuous Rotation of Airy-Hermite-Gaussian Beams with a Cross Phase Propagating Through Uniaxial Crystals

作　　者：朱开成 吴梓豪[1] 唐慧琴 朱洁[3] Zhu Kaicheng;Wu Zihao;Tang Huiqin;Zhu Jie(Department of Electronic and Information Engineering,Guangzhou College of Technology and Business,Guangzhou,Guangdong 510850,China;School of Physics and Electronics,Central South University,Changsha,Hunan 410083,China;Science College,Guizhou Institute of Technology,Guiyang,Guizhou 550003,China)

机构地区：[1]广州工商学院电子工程系,广东广州510850 [2]中南大学物理与电子学院,湖南长沙410083 [3]贵州理工学院理学院,贵州贵阳550003

出　　处：《光学学报》2021年第21期193-199,共7页Acta Optica Sinica

基　　金：贵州省科技计划项目科学技术基金([2020]1Y025);广州工商学院科研基金(KA201930,xj202013714090)。

摘　　要：按照单轴晶体光束传输理论,求得了具有交叉相位艾里-厄米-高斯光束(AiHGB)在单轴晶体中传输时的解析表达式。数值模拟计算结果表明,具有初始交叉相位的AiHGB在晶体中传输时仍是线偏振的,但不一定是传输不变的。具体地讲,有赖于交叉相位系数、光束参数及晶体材料参数,初始交叉相位会引起AiHGB光斑连续转动,在从近场到远场的整个传输过程中总的转动角是90°。并且交叉相位系数足够大时,AiHGB光斑只有纯转动;而交叉相位系数适当小时,AiHGB光斑除了取向转动还有光斑形状变化。这些结果表明通过恰当选择晶体材料(即折射率)和附加交叉相位因子的系数,可以精准调控光束花样形状的取向与结构,也可用于确定晶体材料折射率或测定交叉相位因子的系数。According to the beam transmission theory in uniaxial crystal,the analytical expression of Airy-Hermite-Gaussian beam(AiHGB)with a cross phase propagating in uniaxial crystal is obtained.The numerical simulation results show that AiHGB with initial cross phase is still linearly polarized,but not necessarily transmission invariant.Specifically,depending on the cross phase coefficient,beam parameters,and crystal material parameters,the initial cross phase will cause AiHGB spot to rotate continuously,and the total rotation angle is 90°in the whole transmission process from near field to far field.When the cross phase coefficient is large enough,the AiHGB spot only rotates;When the cross phase coefficient is appropriate small,the AiHGB spot not only rotates in orientation,but also changes in spot shape.These results show that by properly selecting the crystal material(i.e.refractive index)and the coefficient of additional cross phase factor,the orientation and structure of beam pattern shape can be accurately adjusted,and the refractive index of crystal material can be determined or the coefficient of cross phase factor can be measured.

关 键 词：物理光学 艾里-厄米-高斯光束 各向异性单轴晶体 交叉相位 寻常与非寻常折射指数 

分 类 号：O436[机械工程—光学工程]