Metasurface-Enabled On-Chip Manipulation of Higher-Order Poincare Sphere Beams

被引：41

作者：

Ji, Jitao ^{[1
]}

Wang, Zhizhang ^{[1
]}

Sun, Jiacheng ^{[1
]}

Chen, Chen ^{[1
]}

Li, Xueyun ^{[1
]}

Fang, Bin ^{[1
]}

Zhu, Shi-Ning ^{[1
]}

Li, Tao ^{[1
]}

机构：

[1] Nanjing Univ, Coll Engn & Appl Sci, Key Lab Intelligent Opt Sensing & Manipulat, Natl Lab Solid State Microstruct,Jiangsu Key Lab A, Nanjing 210093, Peoples R China

来源：

NANO LETTERS | 2023年 / 23卷 / 07期

基金：

中国国家自然科学基金;

关键词：

beam engineering; metasurface; on-chip integration; manipulation; lithium niobate waveguides; POLARIZATION; GENERATION;

D O I：

10.1021/acs.nanolett.3c00021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An integrated way to generate and manipulate higher-order Poincare sphere beams (HOPBs) is a sought-after goal in photonic integrated circuits for high-capacity communication systems. Here, we demonstrate a novel method for on-chip generation and manipulation of HOPBs through combining metasurface with optical waveguides on lithium niobate on insulator platform. With phase modulation by a diatomic geometric metasurface, guided waves are extracted into free space with a high signal-to-noise ratio in the form of two orthogonal circularly polarized optical vortices which are linearly superposed into HOPBs. Meanwhile, a dual-port waveguide crossing is established to reconfigure the output states into an arbitrary point on a higher-order Poincare sphere based on in-plane interference of two guided waves. Our approach provides a promising solution to generate and manipulate the HOPBs in a compact manner, which would be further enhanced by employing the electro-optical modulation on a lithium niobate waveguide to access a fully tunable scheme.

引用

页码：2750 / 2757

页数：8

共 47 条

[1] Optical metasurfaces for generating and manipulating optical vortex beams [J].