High Pressure Spectroscopy of Ce Doped Yag Crystal

Electronic structure and optical properties of the Ce3☎ in YAG has been investigated by standard spectroscopy (photoluminescence, absorption and excitation spectra) and high pressure spectroscopy. The bandshape of the emission spectrum for different pressures has been analyzed and influence of pressure on energy of the 5d1 states and the electron-lattice coupling have been determined. The significant red shift of the peak of the emission band (the respective pressure coefficient has been equal to—12cm−1/kbar) has been obtained. The shift has been understood by taking into account pressure induced increase of the 5d1 level splitting and increase of the electron-lattice coupling strength.