Specialized directional beaming through a metalens and a typical application

Nanophotonics

article

Kangyi Zhao¹  Hui Zhang¹  Yongqi Fu¹  Shaoli Zhu² 

[1] School of Physical Electronics, University of Electronic Science and Technology of China;Institute for Nanoscale Technology, University of Technology Sydney

关键词: metalens;    directional beaming;    VCSEL;    integration;   

DOI  :  10.1515/nanoph-2017-0056

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The anomalous beaming effect of the periodic metallic corrugations functioning as a special case of k SP =2π/Λ is discussed and verified by means of both theoretical calculation and experimental probing. A metalens is designed on the basis of the special case. Unlike the conventional beaming of convergence or divergence, the metalens can realize beam collimating, which is useful for practical applications. As a typical application example of the metalens, we integrate the metalens together with a vertical cavity surface emission laser (VCSEL) on the top surface of the aperture area. Our experimental results demonstrate that the integrated metalens is capable of suppressing the divergence angle of the VCSEL for collimation use.

【 授权许可】

CC BY