Figure 5
From: Giant nonlinear self-phase modulation of large-amplitude spin waves in microscopic YIG waveguides
Analysis of SPM in the frequency and spatial domains. (a) and (b) Frequency spectra of the spin-wave pulses measured at P = 0.25 and 5 mW, respectively. Dashed curves show the spectra recorded at x = 0, while solid curves show the spectra obtained at x = 10 µm. Vertical dashed lines mark the carrier frequency 4.1 GHz. Arrows in (b) mark the frequencies of the analyzed side components. (c) Normalized temporal profiles of the amplitude envelope A(t) for the spectral components at the specified frequencies. The profile obtained by integration over the entire frequency spectrum is shown for reference. This profile is shifted by 1 a.u. for clarity. (d) Spatial dependences of the amplitude of the main component at 4.1 GHz, side components at 3.9 and 4.3 GHz, as well as the dependence of the total signal integrated over the entire frequency spectrum. Symbols−experimental data. Solid curve−exponential fit.
