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Photoconductive polymer-liquid crystal systems for efficient beam control and amplification

Photoconductive polymer-liquid crystal systems for efficient beam control and amplification
Photoconductive polymer-liquid crystal systems for efficient beam control and amplification
We report on reorientation and two-beam coupling process in liquid crystal cells with different aligning polymer layers. Polymers such as poly(N-vinyl carbazole), pure and doped with fullerenes as well as standard polyimide layers were considered. Electric field distribution inside a liquid crystal cell was modelled and different penetration depths into the liquid crystal bulk were calculated depending on the modulation of surface electric field. The characteristics features of reorientation process were studied via measurements of capacitance with an increasing DC field. The evidence of strong screening was found in cells with photoconducting polymers, as well as in those with thicker polyimide layers. Surface screening layers could be discharged by illuminating a cell with light to induce selective reorientation of a liquid crystal director.
0819459410
20-24
International Society for Optical Engineering
Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Gilchrist, G.
c212edfe-27d5-44c0-913d-efe3b85d3495
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Khoo, Iam-Choon
Society of Photo-Optical Instrumentation
Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Gilchrist, G.
c212edfe-27d5-44c0-913d-efe3b85d3495
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Khoo, Iam-Choon

Dyadyusha, A., Kaczmarek, M., Gilchrist, G. and D'Alessandro, G. (2005) Photoconductive polymer-liquid crystal systems for efficient beam control and amplification. Khoo, Iam-Choon (ed.) In Liquid Crystals IX. vol. 5936, International Society for Optical Engineering. pp. 20-24 . (doi:10.1117/12.616695).

Record type: Conference or Workshop Item (Paper)

Abstract

We report on reorientation and two-beam coupling process in liquid crystal cells with different aligning polymer layers. Polymers such as poly(N-vinyl carbazole), pure and doped with fullerenes as well as standard polyimide layers were considered. Electric field distribution inside a liquid crystal cell was modelled and different penetration depths into the liquid crystal bulk were calculated depending on the modulation of surface electric field. The characteristics features of reorientation process were studied via measurements of capacitance with an increasing DC field. The evidence of strong screening was found in cells with photoconducting polymers, as well as in those with thicker polyimide layers. Surface screening layers could be discharged by illuminating a cell with light to induce selective reorientation of a liquid crystal director.

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More information

Published date: 2005
Venue - Dates: Liquid Crystals IX, 2005-07-31 - 2005-08-02

Identifiers

Local EPrints ID: 42183
URI: https://eprints.soton.ac.uk/id/eprint/42183
ISBN: 0819459410
PURE UUID: 0e64805f-9a4f-4d8d-8b3a-d84a081fa3a9
ORCID for G. D'Alessandro: ORCID iD orcid.org/0000-0001-9166-9356

Catalogue record

Date deposited: 22 Nov 2006
Last modified: 14 Mar 2019 01:52

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Contributors

Author: A. Dyadyusha
Author: M. Kaczmarek
Author: G. Gilchrist
Author: G. D'Alessandro ORCID iD
Editor: Iam-Choon Khoo

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