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Proceedings Paper

Numerical modeling for liquid crystal optical phased array and its phase delay characteristic
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Paper Abstract

A practical numerical model for liquid crystal cell is set up based on the geometry structure of liquid crystal optical phased arrays (LCOPA). Model parameters include width and space of electrodes, thickness of liquid crystal layer, alignment layers, electrodes and glass substrates, pre-tilted angles, dielectric constants, elastic constants, the refractive indexes and so on. Especially, the thickness of alignment layer is first considered to the best of our knowledge. According to electrostatic field theory and Frank-Oseen elastic continuum theory, two dimension (2D) electric potential distribution and 2D director distribution are calculated by means of the finite difference method on non-uniform grids. And the phase delay of LCOPA is derived from crystal optics. The influence of cell sizes on phase delay distribution is analyzed. The evaluation function of fringing field effect is provided. And the methods to decrease fringing field effect between electrodes are also discussed.

Paper Details

Date Published: 6 October 2006
PDF: 8 pages
Proc. SPIE 6352, Optoelectronic Materials and Devices, 635225 (6 October 2006); doi: 10.1117/12.688767
Show Author Affiliations
Lin Xu, Harbin Institute of Technology (China)
Jian Zhang, Harbin Institute of Technology (China)
Li-ying Wu, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6352:
Optoelectronic Materials and Devices
Yong Hee Lee; Fumio Koyama; Yi Luo, Editor(s)

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