Zeeman analysis of the ytterbium luminescence in indium phosphide

Ytterbium-doped InP emits a characteristic luminescence band near 1.0 μm, arising from intra-4f-shell transitions of ${\mathrm{Yb}}^{3+}$(4${\mathrm{f}}^{13}$). A Zeeman analysis of the complex set of emission lines, in magnetic fields up to 22 T, reveals that the spectrum arises almost entirely from only one type of cubic Yb center, presumably on a substitutional cation site.