Date
Place
- Room G (Room 306)
- 7. LC-based Laser/Optical Applications
- August 19, 2015 (Wednesday)
- 09:00 ~ 10:30
- [7-1]
- 09:00 ~ 09:25
- Title:[Invited] Tunable Liquid Crystal Lasers Based on Nanoimprinted Transparent Electrodes
- Na Young Ha (Ajou Univ, Korea)
Abstract: Transparent conducting films have been developed for transparent electrodes in various photonic applications such as flat-panel displays, touch screens, and solar cells. Particularly, indium tin oxide (ITO) film is one of the widely used transparent electrodes due to its high optical transmission and good electrical conductivity. Recently, we fabricated ITO films with one-dimensional periodic nanostructures by all-solution processing of ITO nanoparticles and a nanoimprint lithography method. The nanoimprint lithography used in this study is a promising technique for quick, simple, and low-cost surface patterning with submicron resolution. Here, we used this nanoimprinted ITO film as a distributed feedback (DFB) resonator, transparent electrode, and alignment layer of nematic liquid crystals. Dye-doped nematic liquid crystals were introduced into the DFB resonator. In addition, the electro-optic performance of the lasing device based on nanoimprinted ITO electrodes is demonstrated successfully. From the field-induced reorientation of nematic LCs and hence changes in the refractive indices of the guided laser mode, laser emission shifts at low applied voltages, below 10 V. The present lasing device provides various opportunities in photonic device application and its simple fabrication process can be readily used for large area geometries from the viewpoint of practical application.
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