SPECIAL TOPIC—Physical research in liquid crystal |
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Asymmetric dynamic phase holographic grating in nematic liquid crystal |
Chang-Yu Ren(任常愚)1, Hong-Xin Shi(石宏新)1, Yan-Bao Ai(艾延宝)2, Xiang-Bao Yin(尹向宝)1, Feng Wang(王丰)1, Hong-Wei Ding(丁红伟)1 |
1. School of Science, Heilongjiang University of Science and Technology, Harbin 150022, China; 2. Electrization and Control Engineering School, Heilongjiang University of Science and Technology, Harbin 150022, China |
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Abstract A new scheme for recording a dynamic phase grating with an asymmetric profile in C60-doped homeotropically aligned nematic liquid crystal (NLC) was presented. An oblique incidence beam was used to record the thin asymmetric dynamic phase holographic grating. The diffraction efficiency we achieved is more than 40%, exceeding the theoretical limit for symmetric profile gratings. Both facts can be explained by assuming that a grating with an asymmetric saw-tooth profile is formed in the NLC. Finally, physical mechanism and mathematical model for characterizing the asymmetric phase holographic grating were presented, based on the photo-refractive-like (PR-like) effect.
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Received: 27 May 2016
Accepted manuscript online:
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PACS:
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42.70.Df
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(Liquid crystals)
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42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.40.Eq
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(Holographic optical elements; holographic gratings)
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42.40.Lx
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(Diffraction efficiency, resolution, and other hologram characteristics)
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Fund: Project supported by the Science and Technology Programs of the Educational Committee of Heilongjiang Province, China (Grant No. 12541730) and the National Natural Science Foundation of China (Grant No. 61405057). |
Corresponding Authors:
Chang-Yu Ren
E-mail: renchangyu@126.comedu.cn,renchangyu@usth.edu.cn
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Cite this article:
Chang-Yu Ren(任常愚), Hong-Xin Shi(石宏新), Yan-Bao Ai(艾延宝), Xiang-Bao Yin(尹向宝), Feng Wang(王丰), Hong-Wei Ding(丁红伟) Asymmetric dynamic phase holographic grating in nematic liquid crystal 2016 Chin. Phys. B 25 094218
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