Near-field characteristics of highly non-paraxial subwavelength optical fields with hybrid states of polarization

doi:10.1088/1674-1056/26/10/104202

Abstract The vectorial structure of an optical field with hybrid states of polarization (SoP) 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 SoP 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

Received: 20 March 2017
Revised: 08 May 2017
Accepted manuscript online:

PACS:	42.25.Bs	(Wave propagation, transmission and absorption)
	42.25.Ja	(Polarization)
	42.60.Jf	(Beam characteristics: profile, intensity, and power; spatial pattern formation)

Fund: Project supported by the Zhejiang Provincial Natural Science Foundation, China (Grant Nos. LZ17A040001 and LY16A040014), the National Natural Science Foundation of China (Grant Nos. 11574271 and 11574272), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, and the Science Research Foundation of Zhejiang Sci-Tech University (ZSTU), China (Grant No. 14062078-Y).

Corresponding Authors: Rui-Pin Chen
E-mail: chenrp@zstu.edu.cn

Cite this article:

Rui-Pin Chen(陈瑞品), Teng-Yue Gao(高腾跃), Khian-Hooi Chew(周健辉), Chao-Qing Dai(戴朝卿), Guo-Quan Zhou(周国泉), Sai-Ling He(何赛灵) Near-field characteristics of highly non-paraxial subwavelength optical fields with hybrid states of polarization 2017 Chin. Phys. B 26 104202

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Near-field characteristics of highly non-paraxial subwavelength optical fields with hybrid states of polarization

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