Europium luminescence enhancement induced by a resonant mode in a waveguide of planar metallic walls

Aldo S. Ramírez-Duverger, R. Aceves, Raúl García-Llamas, Jorge A. Gaspar-Armenta

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Resumen

We report the experimental results of emission from europium ions inside a planar waveguide. The waveguide is constituted by a MgF2:Eu 2+ film between Al metallic walls, with a film thickness appropriate to support a guided mode with wavelength inside of the excitation spectrum of the Eu ions. A guided mode is produced by incident light through a thin metallic film at an angle of incidence such that its wave vector component parallel to the waveguide couples resonantly to the mode. The luminescence of Eu 2+ in the waveguide of polycrystalline MgF2 was found to have a maximum at 440 nm. This emission was ascribed to electronic transitions of Eu2+ ions dipoles on a lattice of MgF2. For an excitation light of 360 nm, the integrated emission versus angle of incidence showed a maximum for an incident light angle of 20°. This behavior is explained because of the excitation light, for those wavelength and angle of incidence, couple to a mode along the waveguide and more emitters are excited in the optical path of the guided light.

Idioma originalInglés
Número de artículo053111
PublicaciónJournal of Applied Physics
Volumen107
N.º5
DOI
EstadoPublicada - 2010

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