期刊
APPLIED PHYSICS LETTERS
卷 100, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3698384
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资金
- National Science Council (NSC) of the Republic of China (Taiwan) [NSC 98-2112-M-006-001-MY3, NSC 99-2119-M-110-006-MY3]
- Advanced Optoelectronic Technology Center of the National Cheng Kung University
This work proposes two mechanisms for switching the direction of stripes in cholesteric liquid crystal (CLC) gratings. The stripe direction depends on the ratio of cell gap to the natural pitch length (d/P-0) of a CLC sample. Electrical switching is based on the different pitches at the planar and the transient planar states. Optical switching, however, changes pitch by using the photo-isomerization effect of the azobenzene doped in a CLC sample. Using the two mechanisms, we can switch the stripe directions in two orthogonal directions. Furthermore, the beam-steering capability of CLC gratings also remains effective after switching directions. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3698384]
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