Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture

doi:10.1088/1674-1056/19/7/074202

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74202-074202.doi: 10.1088/1674-1056/19/7/074202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture

陈宝算, 蒲继雄

Department of Information Science & Engineering, Huaqiao University, Quanzhou 362021, China

收稿日期:2009-11-15 出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 60977068), and the Natural Science Foundation of Fujian Province, China (Grant No. A0810012).

Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture

Chen Bao-Suan(陈宝算) and Pu Ji-Xiong(蒲继雄)^†

Department of Information Science & Engineering, Huaqiao University, Quanzhou 362021, China

Received:2009-11-15 Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 60977068), and the Natural Science Foundation of Fujian Province, China (Grant No. A0810012).

摘要/Abstract

摘要： Based on the vectorial Debye theory, the focusing properties of the Gaussian beam through an annular high numerical aperture are studied numerically, including the intensity, the phase and the orbital angular momentum properties. Then the influence of certain parameters on the focusing properties is also investigated. It is shown that sub-wavelength elliptical light spots can be obtained. And there exists a vortex in the longitudinal component of the focused field even though the incident beam is Gaussian beam, indicating that the spin angular momentum of the elliptically polarized Gaussian beam is converted into the orbital angular momentum by the focusing.

Abstract: Based on the vectorial Debye theory, the focusing properties of the Gaussian beam through an annular high numerical aperture are studied numerically, including the intensity, the phase and the orbital angular momentum properties. Then the influence of certain parameters on the focusing properties is also investigated. It is shown that sub-wavelength elliptical light spots can be obtained. And there exists a vortex in the longitudinal component of the focused field even though the incident beam is Gaussian beam, indicating that the spin angular momentum of the elliptically polarized Gaussian beam is converted into the orbital angular momentum by the focusing.

Key words: Debye theory high numerical aperture, elliptically polarized, focusing

中图分类号: (Beam characteristics: profile, intensity, and power; spatial pattern formation)

42.60.Jf

42.79.Bh (Lenses, prisms and mirrors)

陈宝算, 蒲继雄. Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture[J]. 中国物理B, 2010, 19(7): 74202-074202.

Chen Bao-Suan(陈宝算) and Pu Ji-Xiong(蒲继雄). Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture[J]. Chin. Phys. B, 2010, 19(7): 74202-074202.

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Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture

Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture

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