From Cartesian to polar: a new POLICRYPS geometry for realizing circular optical diffraction gratings

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Liquid crystals (LCs) are widely used in optical devices.
• Diffraction gratings are essential optical components.
• Existing techniques for fabricating gratings have limitations in achieving specific symmetries.

Purpose of the Study:

• To realize a liquid crystal (LC)-based optical diffraction grating with polar symmetry.
• To extend the capabilities of the POLICRYPS technique to polar geometries.
• To enable applications requiring rotational optical beam structures.

Main Methods:

• Utilized the POLICRYPS (Polymer-stabilized Liquid Crystal Polymer-Stabilized) technique.
• Employed spherical aberration from simple optical elements to achieve polar director alignment.
• Fabricated a circular optical diffraction grating with a stable polar pattern.

Main Results:

• Successfully realized an LC-based optical diffraction grating with polar director alignment symmetry.
• Demonstrated the extension of Cartesian geometry grating performance to polar geometry.
• Achieved a highly stable polar pattern suitable for circular grating fabrication.

Conclusions:

• The developed technique offers a promising method for fabricating polar optical diffraction gratings.
• The results are significant for applications demanding rotational optical beam structures.
• This work advances the application of LC-based gratings in optical engineering.