Time dependence of soliton formation in planar cells of nematic liquid crystals

Beeckman, Jeroen; Neyts, Kristiaan; Hutsebaut, Xavier; Cambournac, Cyril; Haelterman, Marc

doi:10.1109/jqe.2005.845928

Cited by 25 publications

(16 citation statements)

References 19 publications

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“…1d. The maximum nonlinear deflection of the beam was obtained for a finite b in , rather than the predicted b in ¼ 0, because powers above an upper value caused the beam to wiggle strongly due to temporal instabilities in the medium 37,38 . Figure 5a is not perfectly symmetric due to the unavoidable sample imperfections and the finite experimental accuracy.…”

Section: Resultsmentioning

confidence: 86%

Power-controlled transition from standard to negative refraction in reorientational soft matter

et al. 2014

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Refraction at a dielectric interface can take an anomalous character in anisotropic crystals, when light is negatively refracted with incident and refracted beams emerging on the same side of the interface normal. In soft matter subject to reorientation, such as nematic liquid crystals, the nonlinear interaction with light allows tuning of the optical properties. We demonstrate that in such material a beam of light can experience either positive or negative refraction depending on input power, as it can alter the spatial distribution of the optic axis and, in turn, the direction of the energy flow when traveling across an interface. Moreover, the nonlinear optical response yields beam self-focusing and spatial localization into a selfconfined solitary wave through the formation of a graded-index waveguide, linking the refractive transition to power-driven readdressing of copolarized guided-wave signals, with a number of output ports not limited by diffraction.

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Section: Resultsmentioning

confidence: 86%

Power-controlled transition from standard to negative refraction in reorientational soft matter

et al. 2014

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“…The same applies to the reorientation angle profiles. A comparison between the beam intensity and the reorientation angle distributions shows that the reorientation angle distribution is always much wider, owing to strong nonlocality for the given parameters, [4,11,15,16].…”

Section: Results Of Numerical Simulationmentioning

confidence: 99%

“…The temporal evolution of the angle of reorientation θ is given by the dimensionless diffusion equation [7,10,11]: * corresponding author; e-mail: strinic@phy.bg.ac.yu…”

Section: The Modelmentioning

confidence: 99%

Hyper-Solitons in Nematic Liquid Crystals

2009

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We study laser light propagation in a cell containing a liquid crystal in the nematic phase. We launch hyper-Gaussian beams and follow their behavior within the cell, in time and in three spatial dimensions, utilizing an appropriately developed theoretical model and a numerical procedure based on the fast Fourier transform. We demonstrate the formation of stable "hyper-soliton" breathers in a narrow region of beam intensities, for fixed other parameters. Hyper-solitons are similar in appearance and behavior to the usual solitons, formed by launching the usual Gaussian beams; however noticeable differences persist.

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“…For these nematicons only a few milliwatts of light power is needed and propagation distances up to several millimetres are possible [8]. The response time scales with the thickness of the cell and by decreasing the cell thickness the response time may be as low as a few milliseconds [9]. With these nematicons it is possible to perform all-optical switching and logic gating of optical solitons by making use of interactions between nematicons [10].…”

Section: Introductionmentioning

confidence: 99%

Patterned electrode steering of nematicons

Beeckman¹,

Neyts²,

Haelterman³

2006

J. Opt. A: Pure Appl. Opt.

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The interaction of spatial optical solitons in nematic liquid crystals or nematicons with electrically induced waveguides is investigated experimentally and numerically. Our observations show that broad multimode waveguides are able to guide nematicons and permit an angular steering of the signal. This opens the way to combining the all-optical properties of spatial solitons with the reconfigurability of the electrically induced waveguides. Our numerical model is in good agreement with the observed phenomena.

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Time dependence of soliton formation in planar cells of nematic liquid crystals

Cited by 25 publications

References 19 publications

Power-controlled transition from standard to negative refraction in reorientational soft matter

Power-controlled transition from standard to negative refraction in reorientational soft matter

Hyper-Solitons in Nematic Liquid Crystals

Patterned electrode steering of nematicons

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