Guided-mode resonance assisted directional emission of a wavelength-shifting film for application in scintillation detection

Optics Express
Shuang WuYanqing Wu

Abstract

Thin-film luminescent layers as wavelength shifters using in the scintillation detection system suffer with low efficiency due to the total internal reflection and the non-directional emission. In the present work, we design and fabricate a photonic crystal on the surface of LuTaO<sub>4</sub>:Eu<sup>3+</sup> thin-film which is a newly developed luminescent material using in radiation detection systems. The entire structure shows guided-mode resonances with only one TE and TM mode. As a result, the emitting light is effectively extracted. Furthermore, due to only two modes existing in the layer, the directionality of emission is strongly controlled. This result enables the structured LuTaO<sub>4</sub>:Eu<sup>3+</sup> thin-film to be a potential wavelength shifter with high-efficiency.

References

Feb 1, 2008·Physical Review Letters·J AngleUNKNOWN XENON Collaboration
Jul 26, 2008·Nature Nanotechnology·Nikhil GaneshBrian T Cunningham
Nov 15, 2004·Optics Express·Y Ding, R Magnusson
Dec 12, 2012·Physical Review Letters·E AprileUNKNOWN XENON100 Collaboration

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