Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions
Abstract Electro-optical cell based on the cholesteric liquid crystal is studied with unique combination of the boundary conditions: conical anchoring on the one substrate and planar anchoring on another one. Periodic structures in cholesteric layer and their transformation under applied electric fi...
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Nature Portfolio
2021
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oai:doaj.org-article:0676eacbfa6144f8a6836b205e9e14282021-12-02T15:51:12ZElectrically turning periodic structures in cholesteric layer with conical–planar boundary conditions10.1038/s41598-021-87854-z2045-2322https://doaj.org/article/0676eacbfa6144f8a6836b205e9e14282021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87854-zhttps://doaj.org/toc/2045-2322Abstract Electro-optical cell based on the cholesteric liquid crystal is studied with unique combination of the boundary conditions: conical anchoring on the one substrate and planar anchoring on another one. Periodic structures in cholesteric layer and their transformation under applied electric field are considered by polarizing optical microscopy, the experimental findings are supported by the data of the calculations performed using the extended Frank elastic continuum approach. Such structures are the set of alternating over- and under-twisted defect lines whose azimuthal director angles differ by $$180^\circ$$ 180 ∘ . The $$U^+$$ U + and $$U^-$$ U - -defects of periodicity, which are the smooth transition between the defect lines, are observed at the edge of electrode area. The growth direction of defect lines forming a diffraction grating can be controlled by applying a voltage in the range of $$0\le \, V \le 1.3$$ 0 ≤ V ≤ 1.3 V during the process. Resulting orientation and distance between the lines don’t change under voltage. However, at $$V>1.3$$ V > 1.3 V $$U^+$$ U + -defects move along the defect lines away from the electrode edges, and, finally, the grating lines collapse at the cell’s center. These results open a way for the use of such cholesteric material in applications with periodic defect structures where a periodicity, orientation, and configuration of defects should be adjusted.Oxana PrishchepaMikhail KrakhalevVladimir RudyakVitaly SutorminVictor ZyryanovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) |
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Medicine R Science Q Oxana Prishchepa Mikhail Krakhalev Vladimir Rudyak Vitaly Sutormin Victor Zyryanov Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| description |
Abstract Electro-optical cell based on the cholesteric liquid crystal is studied with unique combination of the boundary conditions: conical anchoring on the one substrate and planar anchoring on another one. Periodic structures in cholesteric layer and their transformation under applied electric field are considered by polarizing optical microscopy, the experimental findings are supported by the data of the calculations performed using the extended Frank elastic continuum approach. Such structures are the set of alternating over- and under-twisted defect lines whose azimuthal director angles differ by $$180^\circ$$ 180 ∘ . The $$U^+$$ U + and $$U^-$$ U - -defects of periodicity, which are the smooth transition between the defect lines, are observed at the edge of electrode area. The growth direction of defect lines forming a diffraction grating can be controlled by applying a voltage in the range of $$0\le \, V \le 1.3$$ 0 ≤ V ≤ 1.3 V during the process. Resulting orientation and distance between the lines don’t change under voltage. However, at $$V>1.3$$ V > 1.3 V $$U^+$$ U + -defects move along the defect lines away from the electrode edges, and, finally, the grating lines collapse at the cell’s center. These results open a way for the use of such cholesteric material in applications with periodic defect structures where a periodicity, orientation, and configuration of defects should be adjusted. |
| format |
article |
| author |
Oxana Prishchepa Mikhail Krakhalev Vladimir Rudyak Vitaly Sutormin Victor Zyryanov |
| author_facet |
Oxana Prishchepa Mikhail Krakhalev Vladimir Rudyak Vitaly Sutormin Victor Zyryanov |
| author_sort |
Oxana Prishchepa |
| title |
Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| title_short |
Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| title_full |
Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| title_fullStr |
Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| title_full_unstemmed |
Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| title_sort |
electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/0676eacbfa6144f8a6836b205e9e1428 |
| work_keys_str_mv |
AT oxanaprishchepa electricallyturningperiodicstructuresincholestericlayerwithconicalplanarboundaryconditions AT mikhailkrakhalev electricallyturningperiodicstructuresincholestericlayerwithconicalplanarboundaryconditions AT vladimirrudyak electricallyturningperiodicstructuresincholestericlayerwithconicalplanarboundaryconditions AT vitalysutormin electricallyturningperiodicstructuresincholestericlayerwithconicalplanarboundaryconditions AT victorzyryanov electricallyturningperiodicstructuresincholestericlayerwithconicalplanarboundaryconditions |
| _version_ |
1718385611507761152 |