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Electrically Driven Diffraction Grating Designed for Visible-Wavelength Region

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13 Author(s)
Sun Il Kim ; Samsung Adv. Inst. of Technol., Yongin, South Korea ; Jun Hee Choi ; Chan Wook Baik ; Ho Young Ahn
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We report on an electrically driven diffraction grating designed for visible light, where the 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 3-D displays.

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Electron Device Letters, IEEE  (Volume:34 ,  Issue: 1 )