空间波片偏振调制生成矢量光束的模拟研究
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摘要
为了研究空间可变波片偏振调制生成矢量光束的方法,本文借助琼斯矢量和琼斯矩阵较深入地分析了任意阶拉盖尔-高斯螺旋光束通过空间偏振转换器件生成矢量光束的过程,并根据数学模型对矢量光束的远场强度分布进行了数值仿真.仿真结果表明:线偏振和圆偏振的基模光束可分别通过空间半波片和空间四分之一波片转化生成矢量光束,且随着空间波片阶数的提高,输出光束暗核逐渐增大;空间波片对螺旋光束的作用可以等效为两个正交圆偏振的螺旋分量的叠加,通过轨道角动量偏振检测仿真,证实了该方法的正确性.
In order to study the generation of the vector beams by using the polarization modulation of the spatial variant wave-plate,the Jones vectors and Jones matrix are used to further discuss the process,in which an arbitrary Laguerre-Gaussian beam can be transformed into vector beam.Based on the mathematical mode,the far-field intensity distributions of the generated vector beams have been simulated by numerical method.The simulated results show that,the line-polarized and circularly polarized beams with basic mode can be converted to vector beams by using spatial variant half-wavelength plate and quarter wavelength plate respectively,and the dark core of the output beam increases with an increase of the order of the spatial variant wave-plate.The effects of the spatial variant wave-plate on the helical beams can be equivalent to the superposition of two mutually orthogonal circularly polarized helical beams.The polarization test of the orbital angular momentum confirms the practicability of this method.
In order to study the generation of the vector beams by using the polarization modulation of the spatial variant wave-plate,the Jones vectors and Jones matrix are used to further discuss the process,in which an arbitrary Laguerre-Gaussian beam can be transformed into vector beam.Based on the mathematical mode,the far-field intensity distributions of the generated vector beams have been simulated by numerical method.The simulated results show that,the line-polarized and circularly polarized beams with basic mode can be converted to vector beams by using spatial variant half-wavelength plate and quarter wavelength plate respectively,and the dark core of the output beam increases with an increase of the order of the spatial variant wave-plate.The effects of the spatial variant wave-plate on the helical beams can be equivalent to the superposition of two mutually orthogonal circularly polarized helical beams.The polarization test of the orbital angular momentum confirms the practicability of this method.
引文
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[18]辛璟焘,高春清,李辰.厄米-高斯光束合成任意阶矢量光束[J].中国科学:物理学,力学,天文学,2012,42:1017.
[19]Bomzon Z,Hasman E.The formation of laser beams with pure azimuthal or radial polarization[J].Appl Phys Lett,2000,77:3322.
[20]Beresna M,Gecevicius M,Kazansky P G,et al.Radially polarized optical vortex converter created by femtosecond laser nanostructuring of glass[J].Appl Phys Lett,2011,98:201101.
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[24]Zhao Y,Wang Z,Yu H,et al.Direct generation of optical vortex pulses[J].Appl Phys Lett,2012,101:031113.
[25]Moh K J,Yuan X C,Bu J,et al.Generating radial or azimuthal polarization by axial sampling of circularly polarized vortex beams[J].Appl Opt,2007,46:7544.
[26]Xin J,Gao C,Li C,et al.Measuring orbital angular momentum of helical beams by spatially variable retardation plates[J].Appl Phys B,2012,108:703.
[2]Strohaber J,Scarborough T D,Uiterwaal C J.Ultrashort intense-field optical vortices produced with laser-etched mirrors[J].Appl Opt,2007,46:8583.
[3]He M,Chen Z,Sun S,et al.Propagation properties and self-reconstruction of azimuthally polarized non-diffracting beams[J].Opt Commun,2013,294:36.
[4]Hao X,Kuang C,Wang T,et al.Phase encoding for sharper focus of the azimuthally polarized beam[J].Opt Lett,2010,35:3928.
[5]Weng X,Guo H,Sui G,et al.Modulation for focusing properties of vector beams in imaging systems[J].Opt Commun,2013,311:117.
[6]Kuang C,Hao X,Liu X,et al.Formation of subhalf-wavelength focal spot with ultra long depth of focus[J].Opt Commun,2011,284:1766.
[7]Du F,Zhou Z,Tan Q,et al.Experimental verification on tightly focused radially polarized vortex beams[J].Chin Phys B,2013,22:064202.
[8]Wang T,Kuang C,Hao X,et al.Sharper focal spot belowλ/4of azimuthally polarized illumination phase-encoded by the binary 0/πphase plate[J].Optik,2012,123:2179.
[9]Chen Z,Pu J,Zhao D.Generating and shifting a spherical focal spot in a 4Pi focusing system illuminated by azimuthally polarized beams[J].Phys Lett A,2013,377:2231.
[10]Fatemi F K.Cylindrical vector beams for rapid polarization-dependent measurements in atomic systems[J].Opt Express,2011,19:25143.
[11]刘名扬.左手材料和磁性材料交替排列结构中的角度特征分析[J].四川大学学报:自然科学版,2014,6:027.
[12]Chen W,Zhan Q.Realization of an evanescent Bessel beam via surface plasmon interference excited by a radially polarized beam[J].Opt Lett,2009,34:722.
[13]Bouhelier A,Ignatovich F,Bruyant A,etal.Surface plasmon interference excited by tightly focused laser beams[J].Opt Lett,2007,32:2535.
[14]席思星,王晓雷,黄帅,等.基于光学全息的任意矢量光的生成方法[J].物理学报,2015,64:124202.
[15]刘国威,杨艳芳,何英,等.全光控制产生任意矢量光束[J].光学学报,2015,35:345.
[16]Volpe G,Petrov D.Generation of cylindrical vector beams with few mode fibers excited by LaguerreGaussian beams[J].Opt Commun,2004,237:89.
[17]郭帅凤,刘奎,孙恒信,等.利用液晶空间光调制器产生高阶拉盖尔高斯光束[J].量子光学学报,2015,21:86.
[18]辛璟焘,高春清,李辰.厄米-高斯光束合成任意阶矢量光束[J].中国科学:物理学,力学,天文学,2012,42:1017.
[19]Bomzon Z,Hasman E.The formation of laser beams with pure azimuthal or radial polarization[J].Appl Phys Lett,2000,77:3322.
[20]Beresna M,Gecevicius M,Kazansky P G,et al.Radially polarized optical vortex converter created by femtosecond laser nanostructuring of glass[J].Appl Phys Lett,2011,98:201101.
[21]Gong L,Ren Y,Liu W,et al.Generation of cylindrically polarized vector vortex beams with digital micromirror device[J].J Appl Phys,2014,116:183105.
[22]Maurer C,Jesacher A,Furhapter S,et al.Tailoring of arbitrary optical vector beams[J].New J Phys,2007,9:78.
[23]Yu H,Zhang H,Wang Z,et al.Experimental observation of optical vortex in self-frequency doubling generation[J].Appl Phys Lett,2011,99:241102.
[24]Zhao Y,Wang Z,Yu H,et al.Direct generation of optical vortex pulses[J].Appl Phys Lett,2012,101:031113.
[25]Moh K J,Yuan X C,Bu J,et al.Generating radial or azimuthal polarization by axial sampling of circularly polarized vortex beams[J].Appl Opt,2007,46:7544.
[26]Xin J,Gao C,Li C,et al.Measuring orbital angular momentum of helical beams by spatially variable retardation plates[J].Appl Phys B,2012,108:703.