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Title: Enhancing large-area scintillator detection with photonic crystal cavities
Authors: Ye, Wenzheng
Bizarri, Gregory
Muhammad Danang Birowosuto
Wong, Liang Jie
Keywords: Engineering::Electrical and electronic engineering
Science::Physics::Nuclear and particle physics
Issue Date: 2022
Source: Ye, W., Bizarri, G., Muhammad Danang Birowosuto & Wong, L. J. (2022). Enhancing large-area scintillator detection with photonic crystal cavities. ACS Photonics, 9(12), 3917-3925.
Journal: ACS Photonics
Abstract: Scintillators are materials that emit visible photons when bombarded by high-energy particles (X-ray, γ-ray, electrons, neutrinos, etc.) and are crucial for applications, including X-ray imaging and high-energy particle detection. Here, we show that one-dimensional (1D) photonic crystal (PhC) cavities, added externally to scintillator materials, can be used to tailor the intrinsic emission spectrum of scintillators via the Purcell effect. The emission spectral peaks can be shifted, narrowed, or split, improving the overlap between the scintillator emission spectrum and the quantum efficiency (QE) spectrum of the photodetector. As a result, the overall photodetector signal can be enhanced by over 200%. The use of external PhC cavities especially benefits thick and large-area scintillators, which are needed to stop particles with ultrahigh energy, as in large-area neutrino detectors. Our findings should pave the way to greater versatility and efficiency in the design of scintillators for applications, including X-ray imaging and positron emission tomography.
ISSN: 2330-4022
DOI: 10.1021/acsphotonics.2c01235
DOI (Related Dataset): 10.21979/N9/Y61CFL
Schools: School of Electrical and Electronic Engineering 
Research Centres: CNRS International NTU THALES Research Alliances 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © 2022 American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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