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Photoaligned chiral liquid crystal grating with hysteresis switching

Inge Nys (UGent) , Brecht Berteloot and Kristiaan Neyts (UGent)
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Abstract
Metastable topological states are known to arise when chiral liquid crystal (CLC) is infiltrated in a geometry with strong confinement. This study demonstrates an alternative approach to obtain multistable states, by combining patterned surface anchoring with CLC in a less confined geometry. Long pitch CLC is introduced between two 1D periodically rotating anchoring patterns at the top and bottom substrate with perpendicular rotation direction. Voltage-induced switching is observed by polarizing optical microscopy and diffraction measurements. For some voltages two different stable topological states appear and electrical switching between these two states occurs via a hysteresis loop. The chirality in the LC material induces the formation of a new topological state at low voltages, which is not observed in nonchiral LC cells with the same anchoring configuration. Hysteresis switching between different optical states may find applications in low-power devices with internal memory.
Keywords
Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, chiral liquid crystals, hysteresis, periodic photoalignment, switchable, gratings, topological states, LASER

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Citation

Please use this url to cite or link to this publication:

MLA
Nys, Inge, et al. “Photoaligned Chiral Liquid Crystal Grating with Hysteresis Switching.” ADVANCED OPTICAL MATERIALS, vol. 10, no. 23, 2022, doi:10.1002/adom.202201289.
APA
Nys, I., Berteloot, B., & Neyts, K. (2022). Photoaligned chiral liquid crystal grating with hysteresis switching. ADVANCED OPTICAL MATERIALS, 10(23). https://doi.org/10.1002/adom.202201289
Chicago author-date
Nys, Inge, Brecht Berteloot, and Kristiaan Neyts. 2022. “Photoaligned Chiral Liquid Crystal Grating with Hysteresis Switching.” ADVANCED OPTICAL MATERIALS 10 (23). https://doi.org/10.1002/adom.202201289.
Chicago author-date (all authors)
Nys, Inge, Brecht Berteloot, and Kristiaan Neyts. 2022. “Photoaligned Chiral Liquid Crystal Grating with Hysteresis Switching.” ADVANCED OPTICAL MATERIALS 10 (23). doi:10.1002/adom.202201289.
Vancouver
1.
Nys I, Berteloot B, Neyts K. Photoaligned chiral liquid crystal grating with hysteresis switching. ADVANCED OPTICAL MATERIALS. 2022;10(23).
IEEE
[1]
I. Nys, B. Berteloot, and K. Neyts, “Photoaligned chiral liquid crystal grating with hysteresis switching,” ADVANCED OPTICAL MATERIALS, vol. 10, no. 23, 2022.
@article{01GQF9JRM51TFT4B5NDD72W1J4,
  abstract     = {{Metastable topological states are known to arise when chiral liquid crystal (CLC) is infiltrated in a geometry with strong confinement. This study demonstrates an alternative approach to obtain multistable states, by combining patterned surface anchoring with CLC in a less confined geometry. Long pitch CLC is introduced between two 1D periodically rotating anchoring patterns at the top and bottom substrate with perpendicular rotation direction. Voltage-induced switching is observed by polarizing optical microscopy and diffraction measurements. For some voltages two different stable topological states appear and electrical switching between these two states occurs via a hysteresis loop. The chirality in the LC material induces the formation of a new topological state at low voltages, which is not observed in nonchiral LC cells with the same anchoring configuration. Hysteresis switching between different optical states may find applications in low-power devices with internal memory.}},
  articleno    = {{2201289}},
  author       = {{Nys, Inge and Berteloot, Brecht and Neyts, Kristiaan}},
  issn         = {{2195-1071}},
  journal      = {{ADVANCED OPTICAL MATERIALS}},
  keywords     = {{Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,chiral liquid crystals,hysteresis,periodic photoalignment,switchable,gratings,topological states,LASER}},
  language     = {{eng}},
  number       = {{23}},
  pages        = {{11}},
  title        = {{Photoaligned chiral liquid crystal grating with hysteresis switching}},
  url          = {{http://doi.org/10.1002/adom.202201289}},
  volume       = {{10}},
  year         = {{2022}},
}

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