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Angular-multiplexed multichannel optical vortex arrays generators based on geometric metasurface.

Jinjin Jin¹, Xiong Li^1,2, Mingbo Pu^1,2

¹State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu 610209, China.

|February 22, 2021

Summary

This summary is machine-generated.

Researchers created multichannel optical vortex arrays using ultrathin geometric metasurfaces and angular multiplexing. This method controls diffraction angles, enabling new applications in optical communication and data storage.

Keywords:

Geometrical Optics Metamaterials Optical Materials Optics

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Area of Science:

Optics and Photonics
Metasurface Technology

Background:

Metasurface-based multichannel optical vortex arrays are crucial for advanced applications like high-dimensional information storage and secure encryption.
Traditional multiplexing methods include wavelength and polarization, but diffraction angle offers an alternative dimension.

Purpose of the Study:

To propose and demonstrate multichannel optical vortex arrays using ultrathin geometric metasurfaces based on angular multiplexing.
To explore the regulation of diffraction angles for optical vortex arrays by adjusting incident light angles.

Main Methods:

Utilizing ultrathin geometric metasurfaces for optical vortex array generation.
Employing angular multiplexing to control the diffraction angle of optical vortex arrays.
Investigating the recombination of angular-multiplexed optical vortex arrays.

Main Results:

Successfully constructed multichannel optical vortex arrays for circularly polarized incident light in distinct diffraction regions.
Demonstrated that the diffraction angle of the optical vortex array can be tuned by altering the illumination angle of the incident light.
Investigated the angular-multiplexed recombination of optical vortex arrays, highlighting the interplay between diffraction angle and vortex properties.

Conclusions:

Angular multiplexing with ultrathin geometric metasurfaces provides an effective method for generating multichannel optical vortex arrays.
The ability to regulate diffraction angles opens new possibilities for advanced optical systems.
This approach holds significant potential for applications in optical displays, free-space optical communication, and optical manipulation.