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We demonstrate topological pumping of quadratic optical solitons in dynamic potentials. Unlike cubic systems, quadratic solitons exhibit quantized transport without breakup or fractionalization at high power levels.

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Area of Science:

  • Nonlinear optics
  • Topological physics
  • Soliton dynamics

Background:

  • Topological pumping facilitates quantized particle transport.
  • Quadratic optical solitons are nonlinear wave packets with unique properties.
  • Understanding soliton behavior in dynamic potentials is crucial for optical control.

Purpose of the Study:

  • To investigate topological pumping of quadratic optical solitons.
  • To explore differences in pumping dynamics between quadratic and cubic nonlinear media.
  • To characterize the transition to quantized transport in a dynamic optical potential.

Main Methods:

  • Observation of quantized transport of quadratic solitons.
  • Analysis of soliton behavior in separate, topologically equivalent dynamic optical potentials.
  • Investigation of the role of nonlinearity and sublattice velocity on topological pumping.

Main Results:

  • Quadratic solitons exhibit a transition to quantized transport governed by nonzero Chern numbers.
  • This transition depends on nonlinearity and sublattice velocity, occurring outside the adiabatic regime.
  • Unlike cubic media, quadratic systems show no breakup or fractional pumping at high power.

Conclusions:

  • Topological pumping of quadratic solitons is achievable and distinct from cubic systems.
  • The observed phenomena offer new avenues for controlling light propagation.
  • Quadratic nonlinearities prevent undesirable effects like soliton breakup seen in cubic systems.