Em. Ganapolskii et Dn. Makovetskii, RESONANT PROCESSES OF PERIODIC-MODE ALTERNATION IN STIMULATED MICROWAVE PHONONS EMISSION-SPECTRA, Solid state communications, 90(8), 1994, pp. 501-505
We report the first observation of super-narrow nonlinear resonances i
n stimulated phonon emission under conditions of ruby crystal modulate
d inversion. It has been revealed that large-scale periodic mode alter
nation on small-scale turbulent background is exciting in domains of t
hese resonances. The role of the ruby nuclear spin system in observed
processes is discussed.