| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Tunable Optical Filters Based on Different Configurations with Cholesteric Liquid Crystals |
| CHEN Dan1, YIN Xiang-Bao1, LIU Yong-Jun1**, ZHANG Ling-Li2, MA Ji3, SUN Wei-Min1 |
1Key Lab of In-fiber Integrated Optics (Ministry Education), Harbin Engineering University, Harbin 150001
2Department of Physics, Harbin Institute of Technology, Harbin 150001
3Kent State University, Kent 44240, USA
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| Cite this article: |
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CHEN Dan, YIN Xiang-Bao, LIU Yong-Jun et al 2015 Chin. Phys. Lett. 32 074208 |
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Abstract Optical filters with different configurations based on cholesteric liquid crystals (CLCs) are designed. The central wavelength from CLCs can be tuned by the electric field or temperature. For the electric field tuning, the ITO is designed with circular patterns, which can make the tunable range 18 nm. For the temperature tuning, two-layer-CLC configurations are used. The experimental results indicate that a deepened or broadened bandgap from the CLC can be achieved by different handedness or concentrations of chiral dopants. The spectrum study is carried out.
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Received: 15 April 2015
Published: 30 July 2015
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| PACS: |
42.70.Df
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(Liquid crystals)
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42.79.Ci
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(Filters, zone plates, and polarizers)
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