Two-dimensional photonic lattices in polymer-dispersed liquid crystal composites

Autor(en)

Miha Devetak, Jerneja Milavec, Romano Rupp, B Yao, Irena Drevensek-Olenik

Abstrakt

The relationship between liquid crystal orientational ordering and optical diffraction properties is investigated for a two-dimensional square photonic lattice fabricated in a polymer-dispersed liquid crystal (PDLC) composite. Modifications of the nematic director field in the liquid crystal domains were induced by an external applied voltage and by heating over the nematic-isotropic (N-I) phase transition. They were studied by optical polarization microscopy and by analysing far-field optical diffraction patterns. The intensities of various diffraction orders (from the zeroth up to the eighth diffraction order) were monitored with a CCD camera, and their variations were correlated with the modifications of the director field.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

University of Ljubljana, Jožef Stefan Institute (IJS), Chinese Academy of Sciences (CAS)

Journal

Journal of Optics A: Pure and Applied Optics (Print Edition)

Band

11

Anzahl der Seiten

8

ISSN

1464-4258

DOI

https://doi.org/10.1088/1464-4258/11/2/024020

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103021 Optik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/889bd630-d5c7-44ed-8a33-bc41a2180be8