Fig. 1.

Experimental setup and action spectra for the photodrive of magnetic bubbles. (A) Schematic illustration of magnetic bubbles in an iron garnet film interacting with focused manipulation (pump) laser. (B) Threshold laser power for driving magnetic bubbles plotted together with the absorption spectrum of an iron garnet film. The average power at 1 kHz is adopted for the pulse laser to directly compare with the CW laser source. The wavelength used for generating magnetoelastic waves (1,300 nm) in the main text is indicated with a red arrow.