Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields
| Autor: | A. R. Geivandov, I. V. Kasyanova, Serguei P. Palto, Mikhail I. Barnik |
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| Rok vydání: | 2018 |
| Předmět: |
electrooptics
Materials science Homeotropic alignment General Physics and Astronomy 02 engineering and technology Grating lcsh:Chemical technology lcsh:Technology 01 natural sciences Full Research Paper Switching time liquid crystals Liquid crystal Electric field 0103 physical sciences Nanotechnology vertical alignment in-plane switching lcsh:TP1-1185 General Materials Science Electrical and Electronic Engineering lcsh:Science Microscale chemistry 010302 applied physics lcsh:T business.industry Relaxation (NMR) 021001 nanoscience & nanotechnology lcsh:QC1-999 Nanoscience Electrode Optoelectronics lcsh:Q 0210 nano-technology business lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 11-19 (2018) Beilstein Journal of Nanotechnology |
| ISSN: | 2190-4286 |
| DOI: | 10.3762/bjnano.9.2 |
| Popis: | The ongoing interest in fast liquid crystal (LC) modes stimulated by display technology and new applications has motivated us to study in detail the in-plane switching (IPS) vertically aligned (VA) mode. We have studied how the decrease of the period of the interdigitated electrodes (down to sub-micrometer scale) influences the switching speed, especially the LC relaxation to the initial homeotropic state. We have found that there are two types of the relaxation: a fast relaxation caused by the surface LC sub-layer deformed in the vicinity of the electrodes and the slower relaxation of the bulk LC. The speed of the fast (surface) mode is defined by half of a period of the electrode grating, while the relaxation time of the bulk depends on the LC layer thickness and the length of the driving electric pulses. Thus, the use of the surface mode and the reduction of the electrode grating period can result in significant increase of switching speed compared to the traditional LC modes, where the bulk relaxation dominates in electrooptical response. We have studied thoroughly the conditions defining the surface mode applicability. The numerical simulations are in good agreement with experimental measurements. |
| Databáze: | OpenAIRE |
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