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Polarization properties of cubic blue phases of a cholesteric liquid crystal

Kamil Orzechowski, Marek W Sierakowski, Marzena Sala-Tefelska, Pankaj Joshi, Tomasz R Woliński and Herbert De Smet UGent (2017) OPTICAL MATERIALS. 69. p.259-264
abstract
In this paper, we have experimentally investigated polarization properties of the blue phase of a cholesteric liquid crystal in polycrystalline cells with different alignment layers. Experiments were carried out by various temperatures and wavelengths within the spectral range covering Bragg reflection. It was conclusively demonstrated that the change of polarization state of transmitted light through polycrystalline BP-cell is mainly due to Bragg reflection, while optical activity is relatively small. Besides, the linear birefringence was not observed, as expected. It was shown that the ellipticity of the outgoing polarization state can change from almost linear (1.33%) to elliptic (7.33%), depending on sample orientation, with negligible changing of optical rotatory power (for BP I at 470 nm). The results indicate that also polycrystalline BPLC structure, although locally anisotropic, is macroscopically isotropic showing non-negligible optical activity only for resonant wavelengths, although being much lower than that in a typical cholesteric phase. It was also shown that different alignment layers in BP-cell may shift Bragg reflection spectral range, so influencing the outgoing polarization state for particular wavelength.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Liquid crystal, Chiral media, Blue phase liquid crystal, Optical properties
journal title
OPTICAL MATERIALS
volume
69
pages
6 pages
publisher
Elsevier BV
Web of Science type
Article
Web of Science id
000404305200039
ISSN
0925-3467
DOI
10.1016/j.optmat.2017.04.051
language
English
UGent publication?
yes
classification
A1
id
8531198
handle
http://hdl.handle.net/1854/LU-8531198
date created
2017-09-14 15:06:42
date last changed
2017-09-19 07:53:32
@article{8531198,
  abstract     = {In this paper, we have experimentally investigated polarization properties of the blue phase of a cholesteric liquid crystal in polycrystalline cells with different alignment layers. Experiments were carried out by various temperatures and wavelengths within the spectral range covering Bragg reflection. It was conclusively demonstrated that the change of polarization state of transmitted light through polycrystalline BP-cell is mainly due to Bragg reflection, while optical activity is relatively small. Besides, the linear birefringence was not observed, as expected. It was shown that the ellipticity of the outgoing polarization state can change from almost linear (1.33\%) to elliptic (7.33\%), depending on sample orientation, with negligible changing of optical rotatory power (for BP I at 470 nm). The results indicate that also polycrystalline BPLC structure, although locally anisotropic, is macroscopically isotropic showing non-negligible optical activity only for resonant wavelengths, although being much lower than that in a typical cholesteric phase. It was also shown that different alignment layers in BP-cell may shift Bragg reflection spectral range, so influencing the outgoing polarization state for particular wavelength.},
  author       = {Orzechowski, Kamil and Sierakowski, Marek W and Sala-Tefelska, Marzena and Joshi, Pankaj and Woli\'{n}ski, Tomasz R and De Smet, Herbert},
  issn         = {0925-3467},
  journal      = {OPTICAL MATERIALS},
  keyword      = {Liquid crystal,Chiral media,Blue phase liquid crystal,Optical properties},
  language     = {eng},
  pages        = {259--264},
  publisher    = {Elsevier BV},
  title        = {Polarization properties of cubic blue phases of a cholesteric liquid crystal},
  url          = {http://dx.doi.org/10.1016/j.optmat.2017.04.051},
  volume       = {69},
  year         = {2017},
}

Chicago
Orzechowski, Kamil, Marek W Sierakowski, Marzena Sala-Tefelska, Pankaj Joshi, Tomasz R Woliński, and Herbert De Smet. 2017. “Polarization Properties of Cubic Blue Phases of a Cholesteric Liquid Crystal.” Optical Materials 69: 259–264.
APA
Orzechowski, K., Sierakowski, M. W., Sala-Tefelska, M., Joshi, P., Woliński, T. R., & De Smet, H. (2017). Polarization properties of cubic blue phases of a cholesteric liquid crystal. OPTICAL MATERIALS, 69, 259–264.
Vancouver
1.
Orzechowski K, Sierakowski MW, Sala-Tefelska M, Joshi P, Woliński TR, De Smet H. Polarization properties of cubic blue phases of a cholesteric liquid crystal. OPTICAL MATERIALS. Elsevier BV; 2017;69:259–64.
MLA
Orzechowski, Kamil, Marek W Sierakowski, Marzena Sala-Tefelska, et al. “Polarization Properties of Cubic Blue Phases of a Cholesteric Liquid Crystal.” OPTICAL MATERIALS 69 (2017): 259–264. Print.