Observation of a laser-induced transmittance modification in Ni2+ doped CsCdCl3

The absorbance of the narrow 3A2 → 1A1 (O point group symmetry approximation) crystal-field transition in CsCdCl3 doped with Ni2+ ions can be influenced by a laser tuned to a strong inter-excited state transition reported earlier for this material. The intensity of the band maximum at 525.2 nm decreases to nearly zero for the duration of a laser pulse in resonance with the intense 1A1 ↔ 3T2 inter-excited state transition at 701.7 nm which couples the 1A1 and 3T2 states. Detuning the coupling laser wavelength reduces the effect considerably and thus confirms the importance of this particular inter-excited state transition for the control of a conventional transition from the electronic ground state.