Fig. 6: Enhancement of Brillouin light scattering (BLS) signal from coherently excited spin waves.
From: Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering
Spin wave spectra acquired 1 μm away from the excitation antenna, measured on a bare film (a), and on a 180 nm wide silicon disk (b). Note, that the BLS signal from thermal spin waves is visible for all excitation frequencies, whereas coherently excited spin waves manifest themselves as a strong signal on the diagonal. c Signal from coherent spin waves extracted from the diagonal in (a), (b) after subtraction of the thermal background.
