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Broadband meta-converters for multiple Laguerre-Gaussian modes

Authors :
Yu-Xuan Ren
Kenneth K. Y. Wong
Xiankai Sun
Zejie Yu
Huade Mao
Yue Yu
Shuang Zhang
Source :
Photonics Research. 9:1689
Publication Year :
2021
Publisher :
Optica Publishing Group, 2021.

Abstract

Metasurface provides miniaturized devices for integrated optics. Here, we design and realize a meta-converter to transform a plane-wave beam into multiple Laguerre-Gaussian (LG) modes of different orders at various diffraction angles. The metasurface is fabricated with Au nano-antennas, which vary in length and orientation angle for modulation of both the phase and the amplitude of a scattered wave, on a silica substrate. Our error analysis suggests that the metasurface design is robust over a 400 nm wavelength range. This work presents the manipulation of LG beams through controlling both radial and azimuthal orders, which paves the way in expanding the communication channels by one more dimension (i.e., radial order) and demultiplexing different modes.

Details

ISSN :
23279125
Volume :
9
Database :
OpenAIRE
Journal :
Photonics Research
Accession number :
edsair.doi...........d58a3e8c3f876c75ff0c41c90590bd62
Full Text :
https://doi.org/10.1364/prj.423344