  We present the parametric excitation of spin-wave modes in YIG micro-disks
via parallel pumping. Their spectroscopy is performed using magnetic resonance
force microscopy (MRFM), while their spatial profiles are determined by
micro-focus Brillouin light scattering (BLS). We observe that almost all the
fundamental eigenmodes of an in-plane magnetized YIG micro-disk, calculated
using a micromagnetic eigenmode solver, can be excited using the parallel
pumping scheme, as opposed to the transverse one. The comparison between the
MRFM and BLS data on one side, and the simulations on the other side, provides
the complete spectroscopic labeling of over 40 parametrically excited modes.
Our findings could be promising for spin-wave-based computation schemes, in
which the amplitudes of a large number of spin-wave modes have to be
controlled.
