Optically recorded polymer-based optical vortex generator

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Polarization converters are crucial for generating structured light beams, including optical vortices, with diverse scientific applications.
• Developing affordable and reconfigurable polarization conversion systems remains a key research objective.

Purpose of the Study:

• To investigate the formation of a polarization converter via optical modification of azobenzene-containing polymers.
• To explore the use of laser-induced anisotropy for creating structured light beams.

Main Methods:

• Optical modification of a thin amorphous azobenzene-containing polymer layer using a laser beam.
• Analysis of light-induced trans-cis transitions leading to optical anisotropy.
• Characterization of the induced optical axis distribution under axially symmetric polarized light.

Main Results:

• A polarization converter was successfully formed by optically modifying the polymer layer.
• Light-induced trans-cis transitions in the polymer resulted in significant optical anisotropy.
• Axially symmetric polarization distributions of the laser beam induced a localized, corresponding distribution of the optical axis.
• The induced anisotropy was stable up to the polymer's melting point and reconfigurable.

Conclusions:

• Azobenzene-containing polymers offer a promising platform for creating adaptable polarization converters.
• Optical modification provides an efficient method for generating structured light with precise polarization control.
• The reconfigurable nature of the induced anisotropy opens possibilities for dynamic optical devices.