Directional light output enhancement of scintillators by mixed-scale microstructures based on soft-X-ray interference lithography and self-assembly

In this paper, we have successfully demonstrated that the directional control of the light output of the scintillator can be achieved by mixed-scale microstructures which integrate photonic crystals on the wavelength scale and microlens arrays on the micrometer scale. Compared to the reference sampl...

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Bibliographic Details
Published in:Journal of luminescence 2023-11, Vol.263, p.119982, Article 119982
Main Authors: Yuan, Di, Liu, Mingjie, Huang, Shiming, Zhang, Juannan, Ouyang, Xiaoping, Liu, Bo
Format: Article
Language:English
Subjects:
Directional emission
Light extraction
Microstructure
Scintillator
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Summary:In this paper, we have successfully demonstrated that the directional control of the light output of the scintillator can be achieved by mixed-scale microstructures which integrate photonic crystals on the wavelength scale and microlens arrays on the micrometer scale. Compared to the reference sample, the mixed-scale microstructures can enhance the light output of the scintillator by 3.07-fold at the emergence angle of 35°. This enhancement in the light output exhibits both azimuthal angle and wavelength dependence. Our hybrid simulation and experimental characterization explain the physical mechanism behind the enhanced directional light output. This method holds potential for application in radiation detection systems and other light-emitting devices requiring directional light output. •Mixed-scale microstructures control directional light output of scintillators.•Soft X-ray interference lithography can prepare mixed-scale microstructures.•Directional light output is beneficial for the radiation detection system.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2023.119982