Optical and electro-optical properties of photonic crystals based on polymer-dispersed liquid crystals |
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| Authors: | M-S Li S-Y Huang S-T Wu H-C Lin A Y-G Fuh |
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| Institution: | 1. Institute of Electro-Optical Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan, Republic of China
2. Department of Physics, National Cheng Kung University, Tainan, 701, Taiwan, Republic of China
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| Abstract: | Two-dimensional (2-D) square lattice (SL) photonic crystals (PCs) are fabricated, and their optical/electro-optical properties are studied. The PCs are based on polymer-dispersed liquid crystals (PDLC) that are formed using two-beam interference with double exposures. The PC structure that is observed using a scanning electron microscope matches with the calculated interference pattern. The results of optical/electro-optical studies demonstrate that superprism and negative refraction effects occur at certain incident angles over a range of frequencies and are consistent with the simulated ones. Moreover, the negative refraction efficiency is electrically controllable. |
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