Ce sup 3+ :Na sup + pairs in CaF sub 2 and SrF sub 2 : Absorption and laser-excitation spectroscopy, and the observation of hole burning

Journal Article · Wed Nov 15 00:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.9930· OSTI ID:5244763

Pack, D W; Manthey, W J; McClure, D S ^[1]

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1. Department of Chemistry, Princeton University, Princeton, New Jersey 08544 (US)

Optical evidence of multiple Ce{sup 3+}:Na{sup +} charge-compensation sites in codoped Ce{sup 3+}:Na{sup +}:CaF{sub 2} and Ce{sup 3+}:Na{sup +}:SrF{sub 2} crystals is reported. High-resolution absorption and laser-excitation spectroscopy reveal the presence of numerous lines in the 32 200--32 400-cm{sup {minus}1} region indicating a quasirandom distribution of pair sites. The absorption spectra of annealed Ce{sup 3+}:CaF{sub 2} and Ce{sup 3+}:Na{sup +}:CaF{sub 2} crystals reveal isolated {ital O}{sub {ital h}} lines. This fact has aided the interpretation of the Ce{sup 3+}:Na{sup +} pair spectra. Evidence for photoionization of charge-compensated Ce{sup 3+} sites followed by trapping of the electron at remotely compensated ({ital O}{sub {ital h}}) Ce{sup 3+} sites is presented. Acceptor-type hole burning, the disappearance of the cubic Ce{sup 3+} site's absorption line while exciting the Ce{sup 3+}:Na{sup +} pair centers, is observed in both CaF{sub 2} and SrF{sub 2} hosts. The holes persist for weeks after their creation and survive thermal cycling to room temperature.

• OSTI ID: 5244763
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Vol. 40:14; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM FLUORIDES
IMPURITIES
STRONTIUM FLUORIDES
ABSORPTION SPECTROSCOPY
CERIUM ADDITIONS
DOPED MATERIALS
EXCITATION
ION PAIRS
LASER SPECTROSCOPY
SODIUM ADDITIONS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CERIUM ALLOYS
ENERGY-LEVEL TRANSITIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MATERIALS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SODIUM ALLOYS
SPECTROSCOPY
STRONTIUM COMPOUNDS
360603* - Materials- Properties