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Conversión ascendente para la generación de luz blanca por un solo compuesto compuesto.

Jiwei Wang1, Peter A Tanner

  • 1Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., PR China.

Journal of the American Chemical Society
|December 23, 2009
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo proceso de conversión ascendente de multifotones para polvos de óxido de tierras raras utilizando láseres infrarrojos. Este método genera emisión de luz visible, con los óxidos de tulio e iterbio logrando una conversión hacia arriba de color blanco puro.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Óptica y Fotónica.
  • Física del estado sólido Física del estado sólido

Sus antecedentes:

  • Los polvos de óxidos de tierras raras son cruciales para las aplicaciones ópticas.
  • Los procesos de conversión hacia arriba mejoran la luminiscencia del material.
  • El control de la emisión de conversión ascendente es clave para la fotónica avanzada.

Objetivo del estudio:

  • Informar sobre un nuevo proceso de conversión ascendente de multifotones para polvos de óxidos de tierras raras.
  • Para demostrar la emisión del rango espectral visible a través de la conversión al alza.
  • Para lograr una conversión al alza de color blanco puro utilizando óxidos específicos de tierras raras.

Principales métodos:

  • Utilizando diodos láser infrarrojos para la excitación.
  • Realizar experimentos en un entorno de vacío.
  • Utilizando polvos de óxido de tulio (Tm2O3) e iterbio (Yb2O3).

Principales resultados:

  • Demostración exitosa de la conversión hacia arriba de multifotones.
  • Se observa una intensa emisión de conversión ascendente en el rango espectral visible.
  • La conversión al alza de blanco puro se logra con Tm2O3 (excitación a 808 nm) y Yb2O3 (excitación a 975 nm).

Conclusiones:

  • El proceso de conversión ascendente multifotónico reportado es efectivo para los óxidos de tierras raras.
  • La excitación por láser infrarrojo puede generar eficientemente una emisión de conversión ascendente visible.
  • Los óxidos específicos de tierras raras ofrecen vías para lograr la emisión de luz blanca.