Sayed Fatma A, Bin-Jumah May, Aly Arafa H, Zhaketov V D, Sallah Mohammed, Zaky Zaky A
Physics Department, Faculty of Sciences, TH-PPM Group, Beni-Suef University, Beni Suef, 62514, Egypt.
Department of Biology, college of Science, Princess Nourah bint Abdulrahman University, P.O. BOX 84428, Riyadh, 11671, Saudi Arabia.
Sci Rep. 2025 May 27;15(1):18451. doi: 10.1038/s41598-025-02910-2.
This research investigates the design and performance of quasi-periodic photonic crystals built using Thue-Morse sequences for gamma dosimetry applications. The structures were made of aluminum oxide and porous silicon infused with a poly(ethylene oxide) nanocomposite. The transmittance spectra of these crystals are heavily dependent on their structural evolution, with higher-generation structures exhibiting greater localization of defect modes. The study combines experimental data fitting with theoretical calculations to validate the optical behavior of the developed structures. These calculations were performed using the transfer matrix method over a wavelength range of 500-800 nm. Each structure's sensitivity and quality factor were evaluated in two radiation ranges-0-100 Gy and 100-200 Gy-to determine their potential as gamma dosimeters. The results demonstrate that the proposed structures are highly effective for dosimetry applications. They achieve an optimal balance between sensitivity (0.55 nm/Gy and 0.5 nm/Gy) and sharp defect modes, with quality factors of 1715.9 and 473, respectively. These findings suggest that Thue-Morse sequence-based photonic crystals can serve as highly tunable and efficient gamma radiation sensors.
本研究调查了使用图厄 - 摩尔斯序列构建的准周期光子晶体在伽马剂量测定应用中的设计与性能。这些结构由氧化铝和注入聚环氧乙烷纳米复合材料的多孔硅制成。这些晶体的透射光谱在很大程度上取决于其结构演变，更高代的结构表现出更强的缺陷模式局域化。该研究将实验数据拟合与理论计算相结合，以验证所开发结构的光学行为。这些计算是使用转移矩阵法在500 - 800纳米的波长范围内进行的。在0 - 100戈瑞和100 - 200戈瑞这两个辐射范围内评估了每个结构的灵敏度和品质因数，以确定它们作为伽马剂量计的潜力。结果表明，所提出的结构在剂量测定应用中非常有效。它们在灵敏度（分别为0.55纳米/戈瑞和0.5纳米/戈瑞）和尖锐的缺陷模式之间实现了最佳平衡，品质因数分别为1715.9和473。这些发现表明，基于图厄 - 摩尔斯序列的光子晶体可作为高度可调谐且高效的伽马辐射传感器。
