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Updated: May 3, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Polarization-dependent phase-modulation metasurface for vortex beam (de)multiplexing.

Haisheng Wu¹, Qingji Zeng¹, Xinrou Wang¹

¹International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

Researchers developed a novel metasurface device to simultaneously multiplex and demultiplex orbital angular momentum (OAM) and polarization channels in optical communications. This breakthrough enhances communication capacity by enabling efficient multidimensional signal processing.

Keywords:

metasurface orbital angular momentum mode polarization-dependent phase modulation polarization-division-multiplexing

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Area of Science:

Optics and Photonics
Optical Communications
Metamaterials

Background:

Vortex beams (VBs) offer enhanced communication capacity via multiplexing dimensions like orbital angular momentum (OAM), polarization, and wavelength.
Existing multidimensional multiplexing techniques lack compatible (de)multiplexers.

Purpose of the Study:

To design and demonstrate a polarization-dependent metasurface capable of simultaneously (de)multiplexing OAM and polarization channels.
To validate the performance of the developed device in a high-capacity optical communication system.

Main Methods:

Utilized the Pancharatnam-Berry (PB) phase concept to create a polarization-dependent phase-modulation metasurface.
Integrated two Dammann vortex gratings with orthogonal polarization responses for simultaneous OAM and polarization (de)multiplexing.
Constructed a 16-channel communication system transmitting 400 Gbit/s quadrature-phase shift-keying (QPSK) signals.

Main Results:

Successfully demonstrated simultaneous (de)multiplexing of OAM and polarization channels.
Achieved bit-error-rates (BERs) below 1.67 × 10^-6 at -15 dBm received power.
Validated the system's effectiveness in a 16-channel, 400 Gbit/s QPSK transmission.

Conclusions:

The designed metasurface effectively addresses the need for a compatible (de)multiplexer for multidimensional optical communication systems.
The demonstrated system shows significant potential for future high-capacity optical communication networks.
This work paves the way for advanced optical signal processing using metasurface-based devices.