Design of a one-dimensional photonic crystal for the modification of BaF2 scintillation spectrum

One-dimensional metallic–dielectric photonic crystal (PC) was proposed to modify the scintillation spectrum of BaF2 crystal. For the PC of several periods of Al2O3/MgF2/Al/MgF2, the photonic band of the PC and the corresponding scintillation spectrum of the BaF2 crystal as the functions of geometrical parameters and incident angles were discussed. The band structure of the PC was optimized to achieve high transmittance for the fast emission and deep rejection for the slow emission of the BaF2 crystal. Results show that the relative suppression ratio of the slow to the fast emission reaches 50 and simultaneously the fast emission is greater than 33.3% that of the un-modified BaF2.