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Polarization properties of cubic blue phases of a cholesteric liquid crystal

(2017) OPTICAL MATERIALS. 69. p.259-264
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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.
Keywords
Liquid crystal, Chiral media, Blue phase liquid crystal, Optical properties

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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.
@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},
  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},
}

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