Abstract
Topological defect arrays in liquid crystal is an emerging optical
material for smart windows, displays, gratings, and optical vortex
generators. Formation of defect arrays is investigated using
vertically aligned nematic liquid crystal cells with pad,
crossed-strips, and porous electrodes. The location and types of the
defects are identified using a polarized optical microscope. The pads
and crossed-strips generate alternative radial and hyperbolic defects.
Unexpectedly, the holes create dipoles of radial and hyperbolic
defects, and the dipoles align in parallel order. The best dense
packing of defects is achieved with the
15μm × 15μm
unit cell.
Funder
National Science and Technology
Council
Ministry of Science and Technology,
Taiwan
Subject
Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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