Controlling orbital angular momentum of an optical vortex by varying its ellipticity

被引：25

作者：

Kotlyar, Victor V.

Kovalev, Alexey A. ^{[1
]}

机构：

[1] RAS, Image Proc Syst Inst, Branch FSRC Crystallog & Photon, 151 Molodogvardeyskaya St, Samara 443001, Russia

来源：

OPTICS COMMUNICATIONS | 2018年 / 410卷

基金：

俄罗斯科学基金会;

关键词：

Orbital angular momentum; Topological charge; Gaussian optical vortex; Ellipticity; GAUSSIAN BEAMS; VORTICES;

D O I：

10.1016/j.optcom.2017.10.004

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An exact analytical expression is obtained for the orbital angular momentum (OAM) of a Gaussian optical vortex with a different degree of ellipticity. The OAM turned out to be proportional to the ratio of two Legendre polynomials of adjoining orders. It is shown that if an elliptical optical vortex is embedded into the center of the waist of a circularly symmetrical Gaussian beam, then the normalized OAM of such laser beam is fractional and it does not exceed the topological charge n. If, on the contrary, a circularly symmetrical optical vortex is embedded into the center of the waist of an elliptical Gaussian beam, then the OAM is equal to n. If the optical vortex and the Gaussian beam have the same (or matched) ellipticity degree, then the OAM of the laser beam is greater than n. Continuous varying of the OAM of a laser beam by varying its ellipticity degree can be used in optical trapping for accelerated motion of microscopic particles along an elliptical trajectory as well as in quantum informatics for detecting OAM-entangled photons. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：202 / 205

页数：4

共 24 条

[21] Experimental demonstration of fractional orbital angular momentum entanglement of two photons [J].

Oemrawsingh, SSR ;

Ma, X ;

Voigt, D ;

Aiello, A ;

Eliel, ER ;

't Hooft, GW ;

Woerdman, JP .

PHYSICAL REVIEW LETTERS, 2005, 95 (24)

[22] Experimental study of holographic generation of fractional Bessel beams [J].

Tao, SH ;

Lee, WM ;

Yuan, XC .

APPLIED OPTICS, 2004, 43 (01) :122-126

[23] Superpositions of the orbital angular momentum for applications in quantum experiments [J].

Vaziri, A ;

Weihs, G ;

Zeilinger, A .

JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, 2002, 4 (02) :S47-S51

[24] Experimental observation of sub-Rayleigh quantum imaging with a two-photon entangled source [J].

Xu, De-Qin ;

Song, Xin-Bing ;

Li, Hong-Guo ;

Zhang, De-Jian ;

Wang, Hai-Bo ;

Xiong, Jun ;

Wang, Kaige .

APPLIED PHYSICS LETTERS, 2015, 106 (17)

← 1 2 3 →