Structured light refers to the arbitrarily tailoring of optical fields in all their degrees of freedom(DoFs),from spatial to temporal.Although orbital angular momentum(OAM)is perhaps the most topical example,and celebrating 30 years since its connection to the spatial structure of light,control over other DoFs is slowly gaining traction,promising access to higher-dimensional forms of structured light.Nevertheless,harnessing these new DoFs in quantum and classical states remains challenging,with the toolkit still in its infancy.In this perspective,we discuss methods,challenges,and opportunities for the creation,detection,and control of multiple DoFs for higher-dimensional structured light.We present a roadmap for future development trends,from fundamental research to applications,concentrating on the potential for larger-capacity,higher-security information processing and communication,and beyond.

Chao He;Yijie Shen;Andrew Forbes

Department of Engineering Science,University of Oxford,Parks Road,Oxford OX1 3PJ,UK;Optoelectronics Research Centre,University of Southampton,Southampton SO17 1BJ,UK;School of Physics,University of the Witwatersrand,Private Bag 3,Johannesburg 2050,South Africa

光：科学与应用（英文版）

[1]Chao He;Yijie Shen;Andrew Forbes-.Towards higher-dimensional structured light)[J].光：科学与应用（英文版）,2022(08):1650-1666

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