Radially polarized multi-Gaussian Schell-model beam and its tight focusing properties

被引：81

作者：

Ping, Chengcheng ^{[1
,2
,3
,4
]}

Liang, Chunhao ^{[1
,2
,3
,4
]}

Wang, Fei ^{[1
,2
,3
,4
]}

Cai, Yangjian ^{[1
,2
,3
,4
]}

机构：

[1] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

[3] Soochow Univ, Key Lab Modern Opt Technol, Educ Minist, Suzhou 215006, Peoples R China

[4] Soochow Univ, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Suzhou 215006, Peoples R China

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 26期

基金：

中国国家自然科学基金;

关键词：

CYLINDRICAL-VECTOR BEAMS; PARTIALLY COHERENT BEAMS; SCINTILLATION REDUCTION; EXPERIMENTAL GENERATION; ATMOSPHERIC-TURBULENCE; SINGLE MOLECULES; PROPAGATION; FIELDS; NEEDLE; LIGHT;

D O I：

10.1364/OE.25.032475

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we introduce a new kind of vector multi-Gaussian Schell-model (MGSM) beam named radially polarized MGSM beam as an extension of recently introduced scalar MGSM beam [Opt. Lett. 37, 2970 (2012], and we obtain the realizability conditions of such beam. The tight focusing properties of a radially polarized MGSM beam passing through a high numerical aperture objective lens are investigated numerically based on the vectorial diffraction theory. It is interesting to find that the intensity distributions of both transverse and longitudinal fields near the focus display flat-top beam profiles due to the special correlation functions of the incident beam. Our results clearly show that engineering the structures of the correlation functions of a radially polarized partially coherent beam provides a novel way for shaping both transverse and longitudinal fields distributions, which have potential applications in particle acceleration and laser machining. Finally, we report experimental generation of a radially polarized MGSM beam with the help of a spatial light modulator and a radial polarization converter. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：32475 / 32490

页数：16

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