Title :
Electrically Driven Diffraction Grating Designed for Visible-Wavelength Region
Author :
Kim, Sun Il ; Choi, Jun Hee ; Baik, Chan Wook ; Ahn, Ho Young ; Lee, Yun Sung ; An, Jungkwuen ; Choi, Chil-Sung ; Pyun, Kyungsuk ; Lee, Hong-Seok ; Kwon, Deok-Hwang ; Kim, Min-Kwan ; Kim, Miyoung ; Lee, Sangyoon
Author_Institution :
Samsung Adv. Inst. of Technol., Yongin, South Korea
Abstract :
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.
Keywords :
diffraction gratings; holography; liquid crystal displays; refractive index; 3D display; active hologram; diffraction efficiency; electrically driven diffraction grating; electronics; external DC bias; liquid crystal; metallic nanograting; refractive index variation; visible light; visible-wavelength region; wavelength 633 nm; Diffraction; Diffraction gratings; Electrodes; Gratings; Laser beams; Refractive index; Three dimensional displays; 3-D display; Active hologram; diffraction grating;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2012.2224091
