Year
Month
(Peer-Reviewed) Photonic orbital angular momentum with controllable orientation
Chenhao Wan 万辰皓 ¹ ², Jian Chen 陈建 ¹, Andy Chong ³ ⁴, Qiwen Zhan 詹其文 ¹
¹ School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 上海理工大学 光电信息与计算机工程学院
² School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China 华中科技大学 光学与电子信息学院
³ Department of Electro-Optics and Photonics, University of Dayton, 300 College Park, Dayton, OH 45469, USA
⁴ Department of Physics, University of Dayton, 300 College Park, Dayton, OH 45469, USA
National Science Review, 2021-08-16
Abstract

Vortices are whirling disturbances commonly found in nature ranging from tremendously small scales in Bose-Einstein condensates to cosmologically colossal scales in spiral galaxies. An optical vortex, generally associated with a spiral phase, can carry orbital angular momentum (OAM). The optical OAM can either be in the longitudinal direction if the spiral phase twists in the spatial domain or in the transverse direction if the phase rotates in the spatiotemporal domain.

In this article, we demonstrate the intersection of spatiotemporal vortices and spatial vortices in a wave packet. As a result of this intersection, the wave packet hosts a tilted OAM that provides an additional degree of freedom to the applications that harness the OAM of photons.
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