Holeburning and Optical/RF Double Resonance Studies of Trigonal Ho3+ Centers in CaF2

Abstract

Holeburning in the hyperfine lines associated with the trigonal Ho3+ center in CaF2 has been reported previously [1,2,3]. In these studies it was shown that two mechanisms for the observed holeburning are through a redistribution of population within the ground state hyperfine and superhyperfine levels. In this paper, the extent of the hyperfine holeburning storage is discussed using two laser experiments. In addition, the assignment of superhyperfine resonances to particular neighbouring fluorine ions is made and the doublet structure of the superhyperfine resonances is attributed to significant enhancement of the holmium nuclear moment.