Enhancing Large-Area Scintillator Detection with Photonic Crystal CavitiesClick to copy article linkArticle link copied!
- Wenzheng YeWenzheng YeSchool of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeCNRS-International-NTU-THALES Research Alliance (CINTRA), Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, SingaporeMore by Wenzheng Ye
- Gregory BizarriGregory BizarriSchool of Aerospace, Transport, Manufacturing and Materials, Cranfield University, Cranfield MK43 0AL, U.K.More by Gregory Bizarri
- Muhammad Danang Birowosuto*Muhammad Danang Birowosuto*Email: [email protected]Łukasiewicz Research Network-PORT Polish Center for Technology Development, Stabłowicka 147, 54-066 Wrocław, PolandMore by Muhammad Danang Birowosuto
- Liang Jie Wong*Liang Jie Wong*Email: [email protected]School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeCNRS-International-NTU-THALES Research Alliance (CINTRA), Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, SingaporeMore by Liang Jie Wong
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.
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