| Autor: |
Shi, Lei, McManamon, Paul F., Bos, Philip J. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Aug2008, Vol. 104 Issue 3, p033109, 7p, 4 Diagrams, 5 Graphs |
| Abstrakt: |
We propose a nematic liquid crystal (LC) optical phase plate, with a large continuous in-plane gradient that is variable, and its application to a beam steering device with high efficiency. The device is a vertically aligned, continuous phase, optical phased array (V-COPA) that uses a negative dielectric anisotropy LC material. High steering efficiency of over 95% is demonstrated by modeling the LC director field and its effect on transmitted light. The period of the V-COPA grating can be varied by adjusting an applied voltage profile, which allows for continuous angular control of the diffraction angle. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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