Photo-Alignment Effect in Liquid-Crystal Films Containing Nanoparticles and Azo-Dye

Tsung Hsien Lin; Wen Zheng Chen

doi:10.4028/www.scientific.net/KEM.428-429.276

Paper Titles

Study on Crystal Morphology and Melting Properties of the Isothermally Crystallized Poly(trimethylene Terephthalate)
p.259

Laser Diffractions in Lyotropic Liquid Crystal Formed by Sodium Dodecyl Sulfonate
p.263

Alignment Behaviors on ITO Glass and Electrical Properties of Triphenylene Compound
p.267

Groove-Free Optical Gratings Self-Assembled by Banana-Shaped Molecules
p.272

Photo-Alignment Effect in Liquid-Crystal Films Containing Nanoparticles and Azo-Dye
p.276

A Smart Bent-Core Liquid Crystal to Write Chinese Characters
p.280

Alignment Change of Discotic Liquid Crystal Domains with Wavelength Tunable CO₂ Laser Irradiation
p.284

Blue Light Emission from a Rod-Like Liquid Crystal
p.288

Liquid Crystalline Behavior of Mixture of Two Non-Mesogenic Compounds
p.292

HomeKey Engineering MaterialsKey Engineering Materials Vols. 428-429Photo-Alignment Effect in Liquid-Crystal Films...

Photo-Alignment Effect in Liquid-Crystal Films Containing Nanoparticles and Azo-Dye

Abstract:

This work reports the photo-alignment effect in a liquid-crystal film doped with nanoparticles and azo-dye. Vertical alignment induced by the nanoparticles polyhedral oligomeric silsesquioxanes (POSS) can be switched to homogeneous alignment by the absorption of photo-excited azo-dye. Both electro-optical and surface properties are analyzed to verify this effect. Using this photo-alignment technique in nanoparticle- and azo-dye-doped liquid crystal, the phase grating is also demonstrated. The diffraction efficiency is related to the polarization of the probe light and can be controlled by applying voltage. Both nanoparticle- and azo-dye-induced vertical and homogeneous alignments are non-contact aligning methods. Thus, the technique based on dopant-induced alignment has potential for practical applications.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 428-429)

Pages:

276-279

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.428-429.276

Citation:

Cite this paper

Online since:

January 2010

Authors:

Tsung Hsien Lin, Wen Zheng Chen

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] A. Glushchenko, H. Kresse, V. Reshetnyak, YU. Reznikov and O. Yaroshchuk: Liq. Cryst. Vol. 23 (1997), p.241.

Google Scholar

[2] W. Lee, C. -Y. Wang and Y. -C. Shih: Appl. Phys. Lett. Vol. 85 (2004), p.513.

Google Scholar

[3] C. -Y. Huang, H. -C. Pan, and C. -T. Hsieh: Jpn. J. Appl. Phys., Part 1 Vol. 45, (2006), p.6392.

Google Scholar

[4] I. -S. Baik, S. Y. Jeon, S. H. Lee, K. A. Park, S. H. Jeong, K. H. An and Y. H. Lee: Appl. Phys. Lett. Vol. 87 (2005), p.263110.

Google Scholar

[5] S. -C. Jeng, C. -W. Kuo, H. -L. Wang and C. -C. Liao: Appl. Phys. Lett. Vol. 91 (2007), p.061112.

Google Scholar

[6] C. -W. Kuo, S. -C. Jeng, H. -L. Wang and C. -C. Liao: Appl. Phys. Lett. Vol. 91(2007), p.141103.

Google Scholar

[7] W. -Y. Teng, S. -C. Jeng, C. -W. Kuo, Y. -R. Lin, C. -C. Liao and W. -K. Chin: Opt. Lett. Vol. 33 (2008), p.1663.

Google Scholar

[8] L. -C. Lin, H. -C. Jan, T. -H. Lin and A. Y. -G. Fuh: Opt. Express Vol. 15 (2007) , p.2900.

Google Scholar

[9] T. -H. Lin, H. -C. Jau, S. -Y. Hung, H. -R. Fuh and A. Y. -G. Fuh: Appl. Phys. Lett. Vol. 89 (2006), p.021116.

DOI: 10.1063/1.2219406

Google Scholar

[10] D. K. Owens and R. C. Wend: J. Appl. Polym. Sci. Vol. 13 (1969) , p.1741.

Google Scholar

[11] B. S. Ban, Y. B. Kim, J. Appl. Poly. Sci. Vol. 74 (1999), p.267.

Google Scholar

[12] J. S. Gwag, S. H. Lee, K. -H. Park, W. S. Park, K. -Y Han and C. G. Jhun: J. Appl. Phys. Vol. 93 (2003) , p.4936.

Google Scholar