Abstract

The control of light by light is one of the main aims in modern photonics. In this context, a fundamental cornerstone is the realization of light-written waveguides in real time, resulting in all-optical reconfigurability of communication networks. Light-written waveguides are often associated with spatial solitons, that is, non-diffracting waves due to a nonlinear self-focusing effect in the harmonic regime. From an applicative point of view, it is important to establish the temporal dynamics for the formation of such light-written guides. Here, we investigate theoretically the temporal dynamics in nematic liquid crystals, a material where spatial solitons can be induced using continuous wave lasers with a few milliwatts of power. We fully address the role of the spatial walk-off and the longitudinal nonlocality in the waveguide formation. We show that for powers large enough to induce light self-steering the beam undergoes several fluctuations before reaching the stationary regime, in turn leading to a much longer formation time for the light-written waveguide.

© 2018 Optical Society of America

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References

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Supplementary Material (6)

NameDescription
» Visualization 1       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 1 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).
» Visualization 2       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 1 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).
» Visualization 3       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 1 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).
» Visualization 4       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 38 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).
» Visualization 5       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 30 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).
» Visualization 6       Simulated temporal dynamics of spatial soliton formation from t = 0 s (switching time of the input) to t = 55 s. The intensity on the plane yz is plotted (an effective bidimensional model is used).

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Figures (11)

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Equations (13)

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