Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields
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-mic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2018-01-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.9.2 |
| _version_ | 1819293860147232768 |
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| author | Artur R. Geivandov Mikhail I. Barnik Irina V. Kasyanova Serguei P. Palto |
| author_facet | Artur R. Geivandov Mikhail I. Barnik Irina V. Kasyanova Serguei P. Palto |
| author_sort | Artur R. Geivandov |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-24T04:17:08Z |
| format | Article |
| id | doaj.art-2d00ccb8d14543aa80f2cb2d5ca947c0 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-24T04:17:08Z |
| publishDate | 2018-01-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-2d00ccb8d14543aa80f2cb2d5ca947c02022-12-21T17:15:54ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-01-0191111910.3762/bjnano.9.22190-4286-9-2Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fieldsArtur R. Geivandov0Mikhail I. Barnik1Irina V. Kasyanova2Serguei P. Palto3Liquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky pr-t 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky pr-t 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky pr-t 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky pr-t 59, Moscow, RussiaThe 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.https://doi.org/10.3762/bjnano.9.2electroopticsin-plane switchingliquid crystalsvertical alignment |
| spellingShingle | Artur R. Geivandov Mikhail I. Barnik Irina V. Kasyanova Serguei P. Palto Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields Beilstein Journal of Nanotechnology electrooptics in-plane switching liquid crystals vertical alignment |
| title | Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields |
| title_full | Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields |
| title_fullStr | Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields |
| title_full_unstemmed | Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields |
| title_short | Study of the vertically aligned in-plane switching liquid crystal mode in microscale periodic electric fields |
| title_sort | study of the vertically aligned in plane switching liquid crystal mode in microscale periodic electric fields |
| topic | electrooptics in-plane switching liquid crystals vertical alignment |
| url | https://doi.org/10.3762/bjnano.9.2 |
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