Observation of Nonlinear Coupled Photon-Magnon Oscillations in YIG

概要

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Nonequilibritmna spin waves excited by the parallel ptrtnpitag in an yttriurm iron garnet placedin a zaaicrowave cavity was sttrdied by naeans of additional xveal< taaicroxv?tve signal. The responseof the probe signal represented a tw'o-huttap sjcectrttna ,jttst a1.cove the threshold of' paratnetricinstability. It corresponds to rtaixed oscillations of' photons and ll121RllOIlS and demonstrates thatthe pararnetric spin-wave pair behaves as a single-naode oscilltttor nonlinearly cotrpled wvith theelectronaatgnetic rnode of' tnicrow?tve catvity. We olcserved another splitting in the spectrtrna bef'orethe onset of' atrto-oscill?ttions. It is ?tssunaed to indicate that tlris steardy state of par?tmetric systemconsists of two different p;tr?tttaetric spin-w'ax'e patir's. Theoretical ca1ctrl?ttions which considercotrpled systetaas of resonator uaaode ?rnd uatagnetic sataaple ?rre found to be in good agreernerutwith the experimental data.
社団法人日本物理学会の論文
1998-09-15