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Axially-symmetric sheared polymer network liquid crystals

Yung-Hsun Wu, Yi-Hsin Lin, Hongwen Ren, Xiangyi Nie, Ju-Hyun Lee, and Shin-Tson Wu

Open Access Open Access

Abstract

An axially-symmetric sheared polymer network liquid crystal (SPNLC) device is demonstrated and its performances characterized. Through analyzing the structure of this axially-symmetric SPNLC, we constructed a 3-D model to explain the observed phenomena. The simulation results agree well with the experiment. Two potential applications of such an axially-symmetric SPNLC, namely tunable-focus negative lens and spatial polarization converter, are discussed.

©2005 Optical Society of America

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Supplementary Material (2)

Media 1: MPG (492 KB)     
Media 2: MPG (443 KB)     

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Figures (9)
Fig. 1.
Fig. 1. SPNLC structure observed under crossed polarizers.

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Fig. 2.
Fig. 2. Voltage-dependent transmittance of the axially symmetric SPNLC cell. d=9 µm and λ=633 nm.

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Fig. 3.
Fig. 3. Optical response time of the 9-µm axially-symmetric SPNLC: (a) rise time, and (b) decay time.

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Fig. 4.
Fig. 4. (a) Top view and cross-section of the LC structure; (b) Measured gradient distribution of the phase retardation.

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Fig. 5.
Fig. 5. Simulated pretilt angle distribution of the axially-symmetric SPNLC cell.

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Fig. 6.
Fig. 6. Measured V-T curves at different positions of the axially-symmetric SPNLC cell.

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Fig. 7.
Fig. 7. Measured response time at different positions of the axially-symmetric SPNLC cell.

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Fig. 8.
Fig. 8. (a) A movie shows the real dynamic image of the axially-symmetric SPNLC cell (492KB), and (b) Simulation results (443KB).

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Fig. 9.
Fig. 9. (a) Incident light with vertical linear polarization, (b) Rotationally symmetric half wave plate, and (c) Output light with polarization P=2 field.

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