Near-field properties of diffraction through a circular subwavelength-size aperture

doi:10.1088/1674-1056/21/6/064202

Abstract Analytical nonparaxial vectorial electric field expressions for both Gaussian beams and plane waves diffracted through a circular aperture are derived by using the vector plane angular spectrum method for the first time, which is suitable for the subwavelength aperture and the near-field region. The transverse properties of intensity distributions and their evolutions with the propagating distance, and the power transmission functions for diffracted fields containing the whole field, the evanescent field and the propagating field are investigated in detail, which is helpful for understanding the relationship between evanescent and propagating components in the near-field region and can be applied to apertured near-field scanning optical microscopy.

Keywords: analytical expressions diffraction circular subwavelength aperture near-field properties

Received: 14 November 2011
Revised: 05 December 2011
Accepted manuscript online:

PACS:	42.25.Fx	(Diffraction and scattering)
	42.25.Bs	(Wave propagation, transmission and absorption)
	42.25.-p	(Wave optics)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50975128), the National Key Basic Research Program of China (Grant No. 2011CB013004), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2011462), the National Science Foundation for Postdoctoral Scientists of China (Grant No. 20100481093), and Jiangsu Provincial Planned Projects for Postdoctoral Research Funds, China (Grant No. 0902028C).

Corresponding Authors: Wang Zheng-Ling, Zhou Ming
E-mail: zlwang@ujs.edu.cn; zm2109@126.com

Cite this article:

Wang Zheng-Ling(王正岭), Zhou Ming(周明), Gao Chuan-Yu(高传玉), and Zhang Wei(张伟) Near-field properties of diffraction through a circular subwavelength-size aperture 2012 Chin. Phys. B 21 064202

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Near-field properties of diffraction through a circular subwavelength-size aperture

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