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Updated: Jun 5, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Encoding arbitrary phase profiles to 2D diffraction orders with controllable polarization states.

Ruizhe Zhao¹, Xin Li¹, Guangzhou Geng²

¹Beijing Engineering Research Center of Mixed Reality and Advanced Display, Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

This study presents a novel metasurface method to control light properties in multiple diffraction orders simultaneously. This enables tailored intensity and polarization for advanced optical applications.

Keywords:

diffraction order modulation double-phase method metasurface

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Area of Science:

Optics and Photonics
Materials Science

Background:

Generating 2D diffraction orders with controlled intensity is crucial for applications like optical tweezers and parallel laser fabrication.
Existing methods struggle to simultaneously tailor multiple light parameters (intensity, polarization) across different diffraction orders.

Purpose of the Study:

To demonstrate a method for encoding arbitrary phase profiles and controllable polarization states into distinct diffraction orders.
To enable parallel functionalities by simultaneously manipulating multiple parameters of output light.

Main Methods:

Utilized a double-phase method with an elaborately designed metasurface.
Employed the Gerchberg-Saxton (GS) algorithm to encode sixteen independent holograms.
Encoded holograms into a 4x4 array of diffraction orders with manipulated polarization states.

Main Results:

Successfully encoded sixteen independent holographic images into 4x4 diffraction orders.
Demonstrated controllable polarization states for each diffraction order, verified using Stokes parameters.
Observed predefined holographic images at the Fourier plane with tailored properties.

Conclusions:

The proposed metasurface method effectively tailors multiple properties of output diffraction orders simultaneously.
This approach facilitates parallel functionalities like spectral-polarization imaging and enhances optical communication systems.