Near-field characteristics of highly non-paraxial subwavelength optical fields with hybrid states of polarization |
| |
| Affiliation: | 1. Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China;2. Center for Theoretical Physics, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;3. School of Sciences, Zhejiang A & F University, Lin'an 311300, China;4. Center for Optical and Electromagnetic Research, Zhejiang University, Joint Research Center of Photonics of the Royal Institute of Technology(Sweden) and Zhejiang University(China), Hangzhou 310027, China |
| |
| Abstract: | The vectorial structure of an optical field with hybrid states of polarization(So P) in the near-field is studied by using the angular spectrum method of an electromagnetic beam. Physical images of the longitudinal components of evanescent waves are illustrated and compared with those of the transverse components from the vectorial structure. Our results indicate that the relative weight integrated over the transverse plane of the evanescent wave depends strongly on the number of the polarization topological charges. The shapes of the intensity profiles of the longitudinal components are different from those of the transverse components, and it can be manipulated by changing the initial So P of the field cross-section. The longitudinal component of evanescent wave dominates the near-field region. In addition, it also leads to three-dimensional shape variations of the optical field and the optical spin angular momentum flux density distributions. |
| |
| Keywords: | hybrid states of polarization evanescent wave angular spectrum method longitudinal component |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
