Two-dimensional Fresnel reflection-based columnar photonic scintillator

Abstract The evolution of X-ray detection technology has significantly enhanced sensitivity and spatial resolution in non-destructive imaging of internal structure. However, the problem of low luminescence and transparency of scintillator materials restricts imaging with lower radiation doses and thicker materials. Here, we propose a two-dimensional Fresnel reflection-based columnar photonic scintillator and demonstrate that the optical guiding effect emerging from the structure reduces luminescence leakage and increases the signal intensity by approximately 2 times up to 450 kV. The photonic structure features a fine array pitch and large-scale detection area with rapid fabrication approach. The proposed scheme paves the way for high energy and high sensitivity X-ray imaging.