Nematic liquid crystal alignment on subwavelength metal gratings
We have studied the alignment of a nematic liquid crystal (LC) material on aluminum subwavelength nanogratings as a function of the period, p, and the slit width to period ratio, w/p. A method, based on Fourier analysis of the transmittance spectra of the LC grating system, has been applied. We show...
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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 |
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| Online Access: | https://doi.org/10.3762/bjnano.9.6 |
| _version_ | 1819262483310837760 |
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| author | Irina V. Kasyanova Artur R. Geivandov Vladimir V. Artemov Maxim V. Gorkunov Serguei P. Palto |
| author_facet | Irina V. Kasyanova Artur R. Geivandov Vladimir V. Artemov Maxim V. Gorkunov Serguei P. Palto |
| author_sort | Irina V. Kasyanova |
| collection | DOAJ |
| description | We have studied the alignment of a nematic liquid crystal (LC) material on aluminum subwavelength nanogratings as a function of the period, p, and the slit width to period ratio, w/p. A method, based on Fourier analysis of the transmittance spectra of the LC grating system, has been applied. We show that the gratings provide stable planar alignment only for shorter periods and narrower slits (p < 400 nm, w/p < 2/3). As these parameters increase, the homogeneous surface alignment changes to domains with different tilt angles or to spatially modulated alignment. We have also obtained a 90° twisted LC director distribution, implying sufficiently strong azimuthal LC anchoring at the grating surface. |
| first_indexed | 2024-12-23T19:58:25Z |
| format | Article |
| id | doaj.art-971c3e45878840f3840d61b4ef95ba60 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-23T19:58:25Z |
| publishDate | 2018-01-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-971c3e45878840f3840d61b4ef95ba602022-12-21T17:33:09ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-01-0191424710.3762/bjnano.9.62190-4286-9-6Nematic liquid crystal alignment on subwavelength metal gratingsIrina V. Kasyanova0Artur R. Geivandov1Vladimir V. Artemov2Maxim V. Gorkunov3Serguei P. Palto4Liquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky Ave. 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky Ave. 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky Ave. 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky Ave. 59, Moscow, RussiaLiquid crystals laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Leninsky Ave. 59, Moscow, RussiaWe have studied the alignment of a nematic liquid crystal (LC) material on aluminum subwavelength nanogratings as a function of the period, p, and the slit width to period ratio, w/p. A method, based on Fourier analysis of the transmittance spectra of the LC grating system, has been applied. We show that the gratings provide stable planar alignment only for shorter periods and narrower slits (p < 400 nm, w/p < 2/3). As these parameters increase, the homogeneous surface alignment changes to domains with different tilt angles or to spatially modulated alignment. We have also obtained a 90° twisted LC director distribution, implying sufficiently strong azimuthal LC anchoring at the grating surface.https://doi.org/10.3762/bjnano.9.6alignmentFourier analysisnematic liquid crystalsubwavelength metal grating |
| spellingShingle | Irina V. Kasyanova Artur R. Geivandov Vladimir V. Artemov Maxim V. Gorkunov Serguei P. Palto Nematic liquid crystal alignment on subwavelength metal gratings Beilstein Journal of Nanotechnology alignment Fourier analysis nematic liquid crystal subwavelength metal grating |
| title | Nematic liquid crystal alignment on subwavelength metal gratings |
| title_full | Nematic liquid crystal alignment on subwavelength metal gratings |
| title_fullStr | Nematic liquid crystal alignment on subwavelength metal gratings |
| title_full_unstemmed | Nematic liquid crystal alignment on subwavelength metal gratings |
| title_short | Nematic liquid crystal alignment on subwavelength metal gratings |
| title_sort | nematic liquid crystal alignment on subwavelength metal gratings |
| topic | alignment Fourier analysis nematic liquid crystal subwavelength metal grating |
| url | https://doi.org/10.3762/bjnano.9.6 |
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