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Patterned liquid crystal domain modulated amplitude holography.

Binzhang Jiao, Qipeng Fang, Xiuhui Sun

|July 30, 2025

Summary

This study introduces a novel method using polarized ultraviolet light to precisely control liquid crystal polymer (LCP) film orientation. This technique enables advanced optical amplitude modulation for high-quality holographic displays.

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Area of Science:

Materials Science
Optics
Polymer Science

Background:

Controlling the out-of-plane orientation of nematic liquid crystal molecules is crucial for light-field amplitude modulation and holographic displays.
Liquid crystal polymer (LCP) films typically have two domain types with random orientations, hindering precise molecular alignment.

Purpose of the Study:

To develop a method for achieving uniform single-domain structures in LCP films.
To enable ordered out-of-plane molecular alignment for advanced optical applications.

Main Methods:

Utilizing oblique exposure of polarized ultraviolet (UV) light to induce a transition from dual-domain to single-domain LCP films.
Employing programmable stepping oblique exposure to create patterned domain LCP films.

Main Results:

Achieved over 98% conversion rate from dual-domain to single-domain LCP films.
Demonstrated well-ordered out-of-plane molecular alignment.
Successfully fabricated patterned domain LCP films for amplitude holographic reconstruction.

Conclusions:

Oblique polarized UV light exposure effectively controls LCP film structure and molecular alignment.
This method offers a new strategy for optical amplitude modulation.
Paves the way for developing advanced holographic display technologies.