Organic materials for holographic applications

Volume holography plays an important role in modern optical technology. This research explores organic materials for holographic applications in optical systems. A novel medium composed of azo dye molecules (methyl red sodium salt) and liquid crystals (PCB) was developed for holographic applications. A conformation change of azo dye molecules in cis-trans isomerization reorients liquid crystal molecules. Reversible polarization holograms are recorded dynamically with a threshold intensity as low as 3.0 mW/$cm\sp2$ and a response time from 1 ms to 100 ms depending on the recording spatial frequencies. Surface anchoring forces play a key role in holographic storage. We investigated these forces with differently treated substrates. Optical surface memory effects are described experimentally. We also seek novel materials for dynamic volume holography. Liquid crystal molecules (EBBA and MBBA) have been dispersed in polymer matrices for volume holographic storage. Dynamic holographic effects due to thermal and optically driven anisotropies are observed.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Science and Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Chen, Alan Gengsheng

Contributors dc:contributor

• Payne, David A.

• Physics, Optics
• Engineering, Materials Science

Statement dc:rights

• Copyright 1993 Chen, Alan Gengsheng

Language dc:language

eng

Identifier

AAI9328993
(UMI)AAI9328993

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20260