All-optically controllable scattering mode light modulator based on azobenzene liquid crystals and poly(N-vinylcarbazole) films

Author

Yen-Chen Liu ; Ko-Ting Cheng ; Yuan-Di Chen ; Fuh, Andy Ying-Guey

Author_Institution

Dept. of Opt. & Photonics, Nat. Central Univ., Taoyuan, Taiwan

fYear

2015

fDate

1-4 July 2015

Firstpage

69

Lastpage

72

Abstract

The study reports that isothermal phase transition and induced by photoisomerization of azobenzene liquid crystals (azo-LCs) from trans- to cis-isomers results in the dissolution of poly(N-vinylcarbazole) (PVK) into azo-LCs. All-optically controllable and highly efficient scattering mode light modulators based on PVK films and it´s re-form mechanism were demonstrated.

Keywords

dissolving; isomerisation; isothermal transformations; light scattering; liquid crystal devices; liquid crystals; optical control; optical films; optical modulation; optical polymers; photochemistry; polymer films; PVK films; all-optically controllable scattering mode light modulator; azo-LC; azobenzene liquid crystals; cis-isomers; dissolution; isothermal phase transition; photoisomerization; poly(N-vinylcarbazole) films; reform mechanism; trans-isomers; Isothermal processes; Lighting; Optical scattering; Optical switches; Rough surfaces; Surface roughness;

fLanguage

English

Publisher

ieee

Conference_Titel

Active-Matrix Flatpanel Displays and Devices (AM-FPD), 2015 22nd International Workshop on

Conference_Location

Kyoto

Type

conf

DOI

10.1109/AM-FPD.2015.7173199

Filename

7173199