Fig. 2: Magnon signals in time and frequency domains.
From: Ultrastrong magnon–magnon coupling dominated by antiresonant interactions
a Schematic of THz magnetospectroscopy studies of YFeO3 in a tilted magnetic field. HDC was applied in the b−c plane at an angle of θ with respect to the c-axis, with kTHz//HDC and HTHz polarized in the b−c plane. b Transmitted THz waveform for θ = 20∘ at HDC = 12.60 T displaying beating in the time-domain and two peaks in the frequency domain corresponding to the simultaneous excitation of both magnon modes in YFeO3. c Magnon power spectra for θ = 20∘ and θ = 40∘ at different HDC displaying larger frequency splitting for larger θ.
