Abstract
Integrated devices that emit light beams with orbital angular momentum (OAM) are becoming key components for wide-ranging applications. Here we propose and demonstrate a highly directional silicon photonic vortex beam emitter based on a 3-turn Archimedean spiral adiabatic waveguide integrated with an angular grating. Such a compact emitter is capable of generating vortex beams with small divergence angles and high directivity. Various orders of OAM modes can be selectively generated by the emitter at different wavelengths with a side-mode suppression ratio as large as 13.6 dB.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Shimao Li, Yunhong Ding, Xiaowei Guan, Heyun Tan, Zhichao Nong, Lin Wang, Lin Liu, Lidan Zhou, Chunchuan Yang, Kresten Yvind, Leif Katsuo Oxenløwe, Siyuan Yu, and Xinlun Cai
Opt. Lett. 43(6) 1319-1322 (2018)
Jie Cheng and Chenhao Wan
Opt. Lett. 48(23) 6124-6127 (2023)
Mirco Scaffardi, Muhammad N. Malik, Emma Lazzeri, Charalambos Klitis, Laura Meriggi, Ning Zhang, Marc Sorel, and Antonella Bogoni
Opt. Lett. 42(19) 3749-3752 (2017)