Observation of Self-Cavitating Envelope Dispersive Shock Waves in Yttrium Iron Garnet Thin Films

Abstract

The formation and properties of envelope dispersive shock wave (DSW) excitations from repulsive nonlinear waves in a magnetic film are studied. Experiments involve the excitation of a spin-wave step pulse in a low-loss magnetic Y${}_3$Fe${}_5$O${}_{12}$ thin film strip, in which the spin-wave amplitude increases rapidly, realizing the canonical Riemann problem of shock theory. Under certain conditions, the envelope of the spin-wave pulse evolves into a DSW that consists of an expanding train of nonlinear oscillations with amplitudes increasing from front to back, terminated by a black soliton. The onset of DSW self-cavitation, indicated by a point of zero power and a concomitant 180 phase jump, is observed for sufficiently large steps, indicative of the bidirectional dispersive hydrodynamic nature of the DSW. The experimental observations are interpreted with theory and simulations of the nonlinear Schrödinger equation.

11 pages, 6 figures

References in corpus (7)

• Dispersive shock waves and modulation theory
• On Dispersive and Classical Shock Waves in Bose-Einstein Condensates and Gas Dynamics
• Observation of a gradient catastrophe generating solitons
• Formation of Quantum Shock Waves by Merging and Splitting Bose-Einstein Condensates
• Soliton Turbulence in Shallow Water Ocean Surface Waves
• Observation of dispersive shock waves, solitons, and their interactions in viscous fluid conduits
• Formation of Bright Solitons from Wave Packets with Repulsive Nonlinearity

Cited by in corpus (13)

• Solitonic dispersive hydrodynamics: theory and observation
• Hydrodynamic Optical Soliton Tunneling
• Nonlocal detection of interlayer three-magnon coupling
• Soliton-mean field interaction in Korteweg-de Vries dispersive hydrodynamics
• Whitham modulation theory for the two-dimensional Benjamin-Ono equation
• Nonlinear Schrödinger equations and the universal description of dispersive shock wave structure
• Undular Bores Generated by Fracture
• Formation of dispersive shock waves in evolution of a two-temperature collisionless plasma
• Spin-injection-generated shock waves and solitons in a ferromagnetic thin film: the spin piston problem
• Spin-Injection-Generated Shock Waves and Solitons in a Ferromagnetic Thin Film
• Controlling Dispersive Hydrodynamic Wavebreaking in a Viscous Fluid Conduit
• Fate of the "vacuum point'' and of grey solitons in dispersive quantum shock waves in a one-dimensional Bose gas
• Phase transitions of photon fluid flows driven by a virtual all-optical piston