Ultraviolet and white photon avalanche upconversion in Ho{sup 3+}-doped nanophase glass ceramics

Journal Article · Mon Jan 31 04:00:00 EST 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1861975· OSTI ID:20636991

Lahoz, F; Martin, I R; Calvilla-Quintero, J M ^[1]

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1. Departmento de Fisica Fundamental y Experimental, Electronica y Sistemas, University of La Laguna, 38206 La Laguna, Tenerife (Spain)

Ho{sup 3+}-doped fluoride nanophase glass ceramics have been synthesized from silica-based oxyfluoride glass. An intense white emission light is observed by the naked eye under near infrared excitation at 750 nm. This visible upconversion is due to three strong emission bands in the primary color components, red, green, and blue. Besides, ultraviolet signals are also recorded upon the same excitation wavelength. The excitation mechanism of both the ultraviolet and the visible emissions is a photon avalanche process with a relatively low pump power threshold at about 20 mW. The total upconverted emission intensity has been estimated to increase by about a factor of 20 in the glass ceramic compared to the precursor glass, in which an avalanche type mechanism is not generated.

• OSTI ID: 20636991
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 86; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM COMPOUNDS
CERAMICS
COLOR
DOPED MATERIALS
EXCITATION
FLUORIDES
GLASS
HOLMIUM COMPOUNDS
HOLMIUM IONS
MELTING
NANOSTRUCTURES
PHOTOLUMINESCENCE
PRECIPITATION
PRECURSOR
SIGNALS
SILICA
ULTRAVIOLET RADIATION
VISIBLE RADIATION
WAVELENGTHS
YTTRIUM COMPOUNDS