光学学报, 2019, 39 (10): 1031001, 网络出版: 2019-10-09
光子晶体对LYSO闪烁体光输出的影响 下载: 1136次
Effect of Photonic Crystal on Light Output from Lutetium-Yttrium Oxyorthosilicate Scintillators
薄膜 光子晶体 光输出 闪烁体 硅酸钇镥 闪烁体探测器 thin films photonic crystals light output scintillators lutetium-yttrium oxyorthosilicate scintillator detectors
摘要
根据光子晶体(PhCs)提升闪烁体光输出的作用原理,向5 μm厚硅酸钇镥(LYSO)闪烁体的光出射面引入4种不同结构的光子晶体,以提升闪烁体探测器的探测性能。4种PhCs构型分别为六边晶格空气孔型、正方晶格空气孔型、正方晶格圆柱型、正方晶格长方体型。结合Rsoft和MATLAB软件,通过对光子晶体周期、比例、高度三个参量的扫描,得到了每种类型光子晶体的最佳结构参数。模拟结果表明:在LYSO晶体发光中心波长为420 nm的条件下,每种优化后的光子晶体对LYSO的光输出都有一定程度的提升,且六边晶格空气孔型光子晶体对光输出的提升最大,高达17.1945%。
Abstract
According to the principle of improving the light output from scintillators by using photonic crystals (PhCs), we add four PhCs to the 5-μm-thick surface of a lutetium-yttrium oxyorthosilicate (LYSO) scintillator to improve the performance of the scintillator detectors. Four PhC structures are used, i.e., hexagonal air-holes, square air-holes, square cylinders, and square cubic rods. By scanning the period, ratio, and height of PhCs, we acquire four optimized structures using the Rsoft and MATLAB softwares, which is performed under the condition of a 420-nm-center wavelength of LYSO. The simulation results indicate that all the optimized PhC structures exhibit an increased light output and the structure with hexagonal air-holes shows the highest output (up to 17.1945%).
黄乐程, 王光毅, 薛玉雄, 杨生胜. 光子晶体对LYSO闪烁体光输出的影响[J]. 光学学报, 2019, 39(10): 1031001. Lecheng Huang, Guangyi Wang, Yuxiong Xue, Shengsheng Yang. Effect of Photonic Crystal on Light Output from Lutetium-Yttrium Oxyorthosilicate Scintillators[J]. Acta Optica Sinica, 2019, 39(10): 1031001.