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Related Experiment Video

Updated: Jan 13, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Switchable perfect optical vortex beam generator with high efficiency based on geometric phase.

Xinyu Yang^1,2, Yiqiao Wan³, Yuhuai Yang⁴

¹SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, 510006, China.

Scientific Reports

|January 7, 2026

Summary

This summary is machine-generated.

Researchers developed a novel switchable perfect vortex beam (PVB) generator using liquid crystals. This device efficiently creates high-quality vortex beams with stable intensity profiles, advancing optical communication and manipulation technologies.

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Last Updated: Jan 13, 2026

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Published on: August 12, 2013

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Area of Science:

Optics and Photonics
Liquid Crystal Technology
Optical Communication

Background:

Vortex beams with orbital angular momentum (OAM) are crucial for advanced optical applications.
The annular intensity profile of conventional vortex beams limits wavefront modulation flexibility.
Existing methods struggle with efficient and flexible generation of vortex beams.

Purpose of the Study:

To develop a switchable perfect vortex beam (PVB) generator with high efficiency.
To overcome the limitations of conventional vortex beam intensity profiles.
To demonstrate a compact and versatile photonic device for OAM applications.

Main Methods:

Utilized spatially patterned photoalignment of nematic liquid crystals (LC).
Integrated multiplexed geometric phase profiles onto the LC device.
Performed comprehensive simulations and experimental characterization of the generated beams.

Main Results:

Achieved efficient generation of high-quality PVBs with spatially invariant intensity profiles.
Demonstrated control over topological charges from -8 to +8.
Attained an average conversion efficiency of up to 86% for the PVB generator.
Showcased switchability between left- and right-handed circularly polarized beams.

Conclusions:

Successfully demonstrated a highly integrated, flat LC photonic device for generating high-quality PVBs.
The PVB generator offers high efficiency and switchable polarization.
Potential applications include OAM multiplexing in quantum communication and ultrahigh-capacity photonic interconnects.