气候变化领域集成服务门户(CCPortal): Large second-harmonic vortex beam generation with quasi-nonlinear spin

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DOI	10.1016/j.scib.2020.08.043
	Large second-harmonic vortex beam generation with quasi-nonlinear spin–orbit interaction
	Zhao W.; Wang K.; Hong X.; Wang B.; Han X.; Wang K.; Liu W.; Long H.; Wang B.; Lu P.
发表日期	2021
ISSN	20959273
起始页码	449
结束页码	456
卷号	66 期号:5
英文摘要	A harmonic vortex beam is a typical vector beam with a helical wavefront at harmonic frequencies (e.g., second and third harmonics). It provides an additional degree of freedom beyond spin- and orbital-angular momentum, which may greatly increase the capacity for communicating and encoding information. However, conventional harmonic vortex beam generators suffer from complex designs and a low nonlinear conversion efficiency. Here, we propose and experimentally demonstrate the generation of a large second-harmonic (SH) vortex beam with quasi-nonlinear spin–orbit interaction (SOI). High-quality SH vortex beams with large topological charges up to 28 are realized experimentally. This indicated that the quasi-angular-momentum of a plasmonic spiral phase plate at the excitation wavelength (topological charge, q) could be imprinted on the harmonic signals from the attached WS2 monolayer. The generated harmonic vortex beam has a topological charge of ln=2nq (n is the harmonic order). The results may open new avenues for generating harmonic optical vortices for optical communications and enables novel multi-functional hybrid metasurface devices to manipulate harmonic beams. © 2020 Science China Press
关键词	Metalenses Monolayer WS2 Orbital-angular momentum Plasmonic metasurface Second-harmonic generation
英文关键词	Angular momentum; Degrees of freedom (mechanics); Harmonic analysis; Optical communication; Topology; Tungsten compounds; Degree of freedom; Encoding informations; Excitation wavelength; Harmonic frequency; Orbital angular momentum; Second and third harmonics; Spiral phase plates; Topological charges; Vortex flow
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207685
作者单位	Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan, 430205, China; Guangdong Intelligent Robotics Institute, Dongguan, 523808, China; CAS Center for Excellence in Ultra-intense Laser Science, Shanghai, 201800, China
推荐引用方式 GB/T 7714	Zhao W.,Wang K.,Hong X.,等. Large second-harmonic vortex beam generation with quasi-nonlinear spin–orbit interaction[J],2021,66(5).
APA	Zhao W..,Wang K..,Hong X..,Wang B..,Han X..,...&Lu P..(2021).Large second-harmonic vortex beam generation with quasi-nonlinear spin–orbit interaction.Science Bulletin,66(5).
MLA	Zhao W.,et al."Large second-harmonic vortex beam generation with quasi-nonlinear spin–orbit interaction".Science Bulletin 66.5(2021).