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Peculiarities of spatial soliton formation in azobenzene liquid crystal

Rafael Drampyan, Tigran Dadalyan, Anahit Gogyan, Yuri Malakyan, Jeroen Beeckman UGent, Varsenik Nersesyan UGent and Kristiaan Neyts UGent (2018) Proceedings of SPIE. 10684.
abstract
We report the first experimental realization of spatial soliton formation by the Gaussian beam at 632.8 nm in the azobenzene liquid crystal (LC) layer with planar orientation of LC director. By appropriate anti-parallel rubbing of alignment layers on the upper and lower substrates of the cell LC molecules were oriented along the glass substrates nearly perpendicular to the input window of the cell with a small pre-tilt angle of ~2.60 relative to the beam propagation Z direction. The strong self-focusing effect and soliton formation for laser beam with vertical Y-polarization and beam diffraction for horizontal X-polarization have been observed in the absence of an external electric field. The physical model is considered which implies that the interaction of azobenzene molecules with a laser field is much stronger due to a larger coefficient of orientation nonlinearity compared to other LCs, as well as they are not rigidly anchored to the cell boundary. Thus the molecule alignment can be readily varied by a low-power laser field even for a small pre-tilt angle of molecules which leads to the refractive index change and beam self-focusing regime. The numerical integration of the propagation equation for spatial solitons describes the experimental data very well.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (other)
publication status
published
subject
keyword
azobenzene liquid crystal, beam propagation, diffraction, nonlinear optics, self-focusing, spatial soliton
in
Proceedings of SPIE
Proc. SPIE
volume
10684
article number
1068424
pages
9 pages
publisher
SPIE
conference name
Nonlinear Optics and its Applications 2018
conference start
2018-05-14
conference end
2018-05-14
ISBN
9781510618947
9781510618954
DOI
10.1117/12.2307202
language
English
UGent publication?
yes
classification
C1
copyright statement
I don't know the status of the copyright for this publication
id
8563114
handle
http://hdl.handle.net/1854/LU-8563114
alternative location
https://doi.org/10.1117/12.2307202
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10684/1068424/Peculiarities-of-spatial-soliton-formation-in-azobenzene-liquid-crystal/10.1117/12.2307202.short?SSO=1
date created
2018-05-28 09:36:30
date last changed
2018-07-10 09:36:11
@inproceedings{8563114,
  abstract     = {We report the first experimental realization of spatial soliton formation by the Gaussian beam at 632.8 nm in the azobenzene liquid crystal (LC) layer with planar orientation of LC director. By appropriate anti-parallel rubbing of alignment layers on the upper and lower substrates of the cell LC molecules were oriented along the glass substrates nearly perpendicular to the input window of the cell with a small pre-tilt angle of {\texttildelow}2.60 relative to the beam propagation Z direction. The strong self-focusing effect and soliton formation for laser beam with vertical Y-polarization and beam diffraction for horizontal X-polarization have been observed in the absence of an external electric field. The physical model is considered which implies that the interaction of azobenzene molecules with a laser field is much stronger due to a larger coefficient of orientation nonlinearity compared to other LCs, as well as they are not rigidly anchored to the cell boundary. Thus the molecule alignment can be readily varied by a low-power laser field even for a small pre-tilt angle of molecules which leads to the refractive index change and beam self-focusing regime. The numerical integration of the propagation equation for spatial solitons describes the experimental data very well.},
  articleno    = {1068424},
  author       = {Drampyan, Rafael and Dadalyan, Tigran and Gogyan, Anahit and Malakyan, Yuri and Beeckman, Jeroen and Nersesyan, Varsenik and Neyts, Kristiaan},
  booktitle    = {Proceedings of SPIE},
  isbn         = {9781510618947},
  keyword      = {azobenzene liquid crystal,beam propagation,diffraction,nonlinear optics,self-focusing,spatial soliton},
  language     = {eng},
  pages        = {9},
  publisher    = {SPIE},
  title        = {Peculiarities of spatial soliton formation in azobenzene liquid crystal},
  url          = {http://dx.doi.org/10.1117/12.2307202},
  volume       = {10684},
  year         = {2018},
}

Chicago
Drampyan, Rafael, Tigran Dadalyan, Anahit Gogyan, Yuri Malakyan, Jeroen Beeckman, Varsenik Nersesyan, and Kristiaan Neyts. 2018. “Peculiarities of Spatial Soliton Formation in Azobenzene Liquid Crystal.” In Proceedings of SPIE. Vol. 10684. SPIE.
APA
Drampyan, R., Dadalyan, T., Gogyan, A., Malakyan, Y., Beeckman, J., Nersesyan, V., & Neyts, K. (2018). Peculiarities of spatial soliton formation in azobenzene liquid crystal. Proceedings of SPIE (Vol. 10684). Presented at the Nonlinear Optics and its Applications 2018, SPIE.
Vancouver
1.
Drampyan R, Dadalyan T, Gogyan A, Malakyan Y, Beeckman J, Nersesyan V, et al. Peculiarities of spatial soliton formation in azobenzene liquid crystal. Proceedings of SPIE. SPIE; 2018.
MLA
Drampyan, Rafael, Tigran Dadalyan, Anahit Gogyan, et al. “Peculiarities of Spatial Soliton Formation in Azobenzene Liquid Crystal.” Proceedings of SPIE. Vol. 10684. SPIE, 2018. Print.