Spectroscopy of fractional orbital angular momentum states

被引：26

作者：

Berger, Bernd ^{[1
]}

Kahlert, Marius ^{[1
]}

Schmidt, Daniel ^{[1
]}

Assmann, Marc ^{[1
]}

机构：

[1] Tech Univ Dortmund, Expt Phys 2, D-44227 Dortmund, Germany

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 24期

关键词：

LIGHT-BEAMS; LASER-BEAMS; VORTEX; SINGLE; VORTICES;

D O I：

10.1364/OE.26.032248

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present an approach for measuring the orbital angular momentum (OAM) of light tailored towards applications in spectroscopy and non-integer OAM values. It is based on the OAM sorting method (Berkhout et al., Phys. Rev. Lett. 105, 153601 (2010)). We demonstrate that mixed OAM states and fractional OAM states can be identified using moments of the sorted output intensity distribution and OAM states with integer and non-integer topological charge can be clearly distinguished. Furthermore the difference between intrinsic OAM and total OAM for fractional OAM states is highlighted and the importance of the orientation of the fractional OAM beam is shown. All experimental results show good agreement with simulations. Finally we discuss possible applications of this method for spectroscopy of semiconductor systems such as exciton-polaritons in microcavities. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：32248 / 32258

页数：11

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