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Steering and switching of soliton-like beams via interaction in a nanocolloid with positive polarizability

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Abstract

We unveil different regimes for the interaction between two orthogonally polarized soliton-like beams in a colloidal suspension of nanoparticles with positive polarizability. The interaction is always attractive. However, it noticeably changes as a function of the angle and the power distribution between the input beams. For small angles, both interacting solitons fuse into a single entity, whose propagation direction can be continuously steered. As the interaction angle increases, the resulting self-collimated beam can be practically switched between two positions when the power imbalance between the beams is changed. For interaction angles larger than 10°, the result is no longer a single emerging soliton when the input power is balanced between the two beams.

© 2017 Optical Society of America

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Supplementary Material (3)

NameDescription
Visualization 1: MP4 (1724 KB)      Formation of a single soliton (real time). Interaction between two solitons at an input angle of 7° (Regime I: γ<10°), showing steering as the power balance between the input beams is varied (slowed down by a factor of 0.4). Total power: 1.75 W.
Visualization 2: MP4 (448 KB)      Real time video of the interaction between two solitons as the power balance is varied, for an interaction angle of 10° (Transition regime: γ∼10°±0.5°). Projection on a screen of the oscillations when the total power is equally distributed between the beams.
Visualization 3: MP4 (511 KB)      Real time video of two beams interacting with an input angle of 12° (Regime II: γ>10°). The total power (2.0 W) is balanced between the beams. If one beam is blocked, the other forms a soliton whose propagation direction shifts outwards.

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Equations (4)

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