Contribution of Evanescent Waves to Vortex Vector Field with Inhomogeneous Polarization in Near Field
We study the evanescent wave of a vortex vector optical field with inhomogeneous states of polarization in the cross section of the field. The TE and TM terms of the evanescent wave and the propagating wave of a cylindrical vortex vector optical field with inhomogeneous states of polarization in the cross section of the field are derived by the vector angular spectrum method. The vector structure of the evanescent wave and propagating wave components of the cylindrical vector field is demonstrated. The ratio of the evanescent wave and the propagating wave of a cylindrical vector optical field with different states of polarization with different vortex charges n and polarization charges m as a function of propagation distance in near field is described. Comparison between the contribution of TE and TM terms of both the propagating and the evanescent waves of the cylindrical vortex vector field in free space is demonstrated. The intensity (squared modulus) distributions of the TE and TM terms of the propagating and evanescent waves are described to compare the contributions of the propagating and the evanescent waves associated with the cylindrical vector field with inhomogeneous states of polarization in the cross section of the field. These results, therefore, provide useful information on how to spatially manipulate the evanescent waves of a vortex vector cylindrical optical field in near field by choosing appropriate vortex charges n and states of polarization in the cross-section of the field.
Yin-Long Feng Rui-Pin Chen
School of Sciences, Zhejiang A & F University, Linan, Zhejiang 311300, China School of Sciences, Zhejiang A & F University, Linan, Zhejiang 311300, China;Department of Physics,
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
79-81
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）