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26 September 2013 Electrically tunable diffraction grating
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Abstract
We report on electrically-driven diffraction grating, where refractive index of a liquid crystal (LC) was modulated periodically at an interval of 700 nm by applying an external DC bias to a metallic nanograting (NG). The LC-NG structure exhibited a maximum refractive index variation (Δn) of 0.088 and a diffraction efficiency (η) change of 0-16% with a large diffraction angle of 64° for incident light of 633 nm wavelength. This approach, with the help of faster electronics, provides an opportunity of developing active holograms for real 3D display
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Sun Il Kim, Jun Hee Choi, Ho Young Ahn, Chan Wook Baik, Jungkwuen An, Chil-Sung Choi, Kyungsuk Pyun, and Hong-Seok Lee "Electrically tunable diffraction grating", Proc. SPIE 8816, Nanoengineering: Fabrication, Properties, Optics, and Devices X, 881607 (26 September 2013); https://doi.org/10.1117/12.2021994
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