Rabi-like oscillation of photonic topological valley Hall edge states

Abstract

We investigate Rabi-like oscillations of topological valley Hall edge states by introducing two zigzag domain walls in an inversion-symmetry-breaking honeycomb photonic lattice. Such resonant oscillations are stimulated by weak periodic modulation of the lattice depth along the propagation direction that does not affect the overall symmetry and the band topology of the lattice. Oscillations are accompanied by periodic switching between edge states with the same Bloch momentum, but located at different domain walls. Switching period and efficiency are the nonmonotonic functions of the Bloch momentum in the Brillouin zone. We discuss how efficiency of this resonant process depends on detuning of modulation frequency from resonant value. Switching of nonlinear edge states is also briefly discussed. Our work brings about an effective approach to accomplish resonant oscillations of the valley Hall edge states in time-reversal-invariant topological insulators.

arXiv comment6 pages, 6 figures

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Cited by in corpus (8)

• Topological photonic crystals: physics, designs and applications
• Topological Valley Hall Edge State Lasing
• Observation of nonlinearity-controlled switching of topological edge states
• Floquet edge solitons in modulated trimer waveguide arrays
• Rabi oscillation of azimuthons in weakly nonlinear waveguides
• Macroscopic Zeno effect in Su-Schrieffer-Heeger photonic topological insulator
• $\pi$-solitons on a ring of waveguides
• Oscillating edge states in polariton topological insulators