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Two‐Photon Excitation Spectra of Trivalent Rare‐Earth Ion Luminescence in Crystals
Author(s) -
Apanasevich P. A.,
Gintoft R. I.,
Korolkov V. S.,
Makhanek A. G.,
Skripko G. A.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220580236
Subject(s) - ion , excitation , luminescence , spectral line , absorption (acoustics) , atomic physics , photon , absorption spectroscopy , two photon excitation microscopy , chemistry , materials science , molecular physics , physics , optics , optoelectronics , composite material , organic chemistry , quantum mechanics , astronomy
Theoretical and experimental investigations are made of two‐photon absorption spectra of trivalent rare‐earth ions in crystals. Effective cross‐sections, selection rules, and relative intensities of the components are found. The most intensive two‐photon transitions are established. Two‐photon excitation spectra of luminescence of Er 3+ and Ho 3+ ions in CaF 2 are obtained and effective excitation cross‐sections are measured using a tunable dye laser (715 to 850 nm). It is shown that the spectra have a peculiar structure which differs considerably from that of the one‐photon absorption spectra. The experimental results agree with theory. It is established that one of the levels in Ho 3+ is the level 5 G 6 rather than 3 K 7 usually assumed.