High-directional vortex beam emitter based on Archimedean spiral adiabatic waveguides

Shimao Li, Wen Yu, Laura Meriggi, Qingsheng Xiao, Zhichao Nong, Xinlun Cai*, Marc Sorel, Siyuan Yu

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)975-978
Number of pages4
JournalOptics Letters
Volume42
Issue number5
DOIs
Publication statusPublished - 1 Mar 2017

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