Dynamics and spectroscopy of infrared-to-visible upconversion in erbium-doped cesium cadmium bromide (CsCdBr sub 3 :Er sup 3+ )

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.5187· OSTI ID:7047711

Cockroft, N J ^[1]; Jones, G D ^[2]; Nguyen, D C ^[1]

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1. Los Alamos National Laboratory, Chemical and Laser Sciences Division, Mail Stop J564, Los Alamos, New Mexico 87545 (United States)
2. Department of Physics, University of Canterbury, Christchurch (New Zealand)

Trivalent erbium ions in CsCdBr{sub 3} exist predominantly as dimers along one-dimensional lattice chains. Very efficient upconversion from near-infrared to various visible wavelengths was observed. {sup 2}{ital H}{sub 9/2}{r arrow}{sup 4}{ital I}{sub 15/2} (414 nm) and {sup 4}{ital F}{sub 7/2}{r arrow}{sup 4}{ital I}{sub 15/2} (493 nm) fluorescence dominated for {sup 4}{ital I}{sub 15/2}{r arrow}{sup 4}{ital I}{sub 9/2} (801 nm) and {sup 4}{ital I}{sub 15/2}{r arrow}{sup 4}{ital I}{sub 11/2} (984 nm) excitation, respectively. Simultaneous excitation at 801 and 984 nm preferentially populated {sup 4}{ital F}{sub 5/2}, giving {sup 4}{ital F}{sub 5/2}{r arrow}{sup 4}{ital I}{sub 15/2} (455 nm), {sup 4}{ital F}{sub 5/2}{r arrow}{sup 4}{ital I}{sub 13/2} (651 nm), and, by cross relaxation, {sup 4}{ital F}{sub 9/2}{r arrow}{sup 4}{ital I}{sub 15/2} (671 nm). The efficiency of multiple-color upconversion is attributed to low phonon energies and close coupling between ions. Upconversion mechanisms are proposed, and energy-transfer rates determined from the temporal transients.

• OSTI ID: 7047711
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
ALLOYS
BROMIDES
BROMINE COMPOUNDS
CADMIUM BROMIDES
CADMIUM COMPOUNDS
CADMIUM HALIDES
CESIUM BROMIDES
CESIUM COMPOUNDS
DIMERS
ERBIUM ADDITIONS
ERBIUM ALLOYS
FLUORESCENCE
HALIDES
HALOGEN COMPOUNDS
INFRARED SPECTRA
LUMINESCENCE
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SPECTRA
VISIBLE SPECTRA