Directional emission of quantum dot scintillators controlled by photonic crystals

We have demonstrated enhanced light emission from a CdSe/ZnS quantum dot scintillator film in the normal direction by photonic crystal structures. With the control of the photonic crystal structures, a two-fold enhancement was achieved for the wavelength-integrated emission spectra under the excitat...

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Veröffentlicht in:Applied physics letters 2017-08, Vol.111 (8)
Hauptverfasser: Liu, Bo, Wu, Qiang, Zhu, Zhichao, Cheng, Chuanwei, Gu, Mu, Xu, Jun, Chen, Hong, Liu, Jinliang, Chen, Liang, Zhang, Zhongbing, Ouyang, Xiaoping
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Sprache:eng
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Zusammenfassung:We have demonstrated enhanced light emission from a CdSe/ZnS quantum dot scintillator film in the normal direction by photonic crystal structures. With the control of the photonic crystal structures, a two-fold enhancement was achieved for the wavelength-integrated emission spectra under the excitation of both ultra-violet and X-rays, which is beneficial to radiation detection applications. Furthermore, it is found that the optical properties such as the bandwidth and peak wavelength can be controlled by adjusting the thickness of a TiO2 conformal layer which was deposited on the surface of the photonic crystal slab formed from solidified resist.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4993816