Helical pitch-dependent electro-optics of optically high transparent nano-phase separated liquid crystals
| Autor: | Srinivas Pagidi, Ramesh Manda, Young Jin Lim, Hyesun Yoo, Seong Min Song, Yi-Hsin Lin, Seung Hee Lee, Jong Hoon Woo |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science business.industry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electro-optics Atomic and Molecular Physics and Optics Dark state Optics Liquid crystal 0103 physical sciences Transmittance Contrast ratio Photonics 0210 nano-technology business Refractive index Leakage (electronics) |
| Zdroj: | Optics Express. 26:27368 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.26.027368 |
| Popis: | Feeble light leakage in a dark state of conventional optically isotropic liquid crystal (OILC) device has a strong impact on the contrast ratio of a liquid crystal (LC) device. In order to overcome such intrinsic problem, we proposed an OILC in which the LC directors inside droplets are twisted by introducing chirality. The light leakage is effectively suppressed by matching the refractive indices between LC and polymer matrix; consequently, we achieved a high contrast ratio, 1:1401. Interestingly, the on-state transmittance is enhanced by ~49% compared to conventional OILC. The response time was also improved and the hysteresis was suppressed to be negligible. The improved electro-optic performances of the proposed OILC device would give diverse applications in upcoming flexible display and various photonic devices. |
| Databáze: | OpenAIRE |
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