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Improved light extraction efficiency of cerium-doped biomedical imaging scintillator by monolayers of periodic arrays of polystyrene spheres

Published online by Cambridge University Press:  07 January 2014

B. Liu ,
X. Duan  and
Y. Yi
B. Liu
Affiliation:
University of Michigan, MI Tongji University, Shanghai, CN
X. Duan
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA
Y. Yi*
Affiliation:
University of Michigan, MI Massachusetts Institute of Technology, Cambridge, MA
*
*e-mail: [email protected]
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Abstract

Monolayers of arrays of periodic polystyrene (PS) spheres are designed to couple onto the surface of cerium-doped lutetium-yttrium oxyorthosilicate scintillator to improve the light extraction efficiency. The enhancement of extraction efficiency up to 38% relative to the reference case without polystyrene spheres is achieved. Combining with the simulation for the transmission as well as its dispersion relation, detailed analysis of the effect of whispering gallery modes and diffraction on the extraction mechanism are given. As a result, the optimal diameter of 414 nm is obtained based on a trade-off between the transmission loss and the diffraction enhancement.

Keywords

opticalnanostructurebiomedical
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1627: Symposium L – Adaptive Soft Matter through Molecular Networks , 2014 , mrsf13-1627-l09-98
Copyright
Copyright © Materials Research Society 2014 

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References

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