El-Shemy Shimaa, Semeda R, Mobarak M, Eissa M F, Sayed Fatma A, Alshomrany Ali S, Aly Arafa H
Physics Department, Beni-Suef University, Beni Suef, Egypt.
Department of Physics, College of Sciences, Umm Al-Qura University, Al Taif HWY, 24381, Mecca, Saudi Arabia.
Sci Rep. 2024 Aug 27;14(1):19829. doi: 10.1038/s41598-024-65312-w.
In this study, a novel gamma-ray radiation sensor has been developed depending on a 1D photonic crystal (1D-PhC). Based on porous silicon (PSi) layer that has been penetrated by a conjugated copolymer (B-co-MP) which consists of BEHP-PPV and MEH-PPV, with a fractional ratio of 60:40. The suggested method for the development of the dosimeter is based on the shift of photonic band-gap to shorter wavelengths, where exposure to gamma-ray radiation at doses ranging from 0 to 20 kGy alters the refractive index of the (B-co-MP) copolymer. The fitted experimental data, the equation of Bruggeman effective medium, and the transfer matrix method (TMM) are the main axes in the framework of the current theoretical approach. The collected data shows that, within the visible range, the suggested sensor's sensitivity (224 nm/RIU) is high and stable over a 0-20 kGy applied-dose range. Also, we compared these results with previous research.
在本研究中，基于一维光子晶体（1D-PhC）开发了一种新型伽马射线辐射传感器。该传感器基于由BEHP-PPV和MEH-PPV组成、比例为60:40的共轭共聚物（B-co-MP）渗透的多孔硅（PSi）层。所建议的剂量计开发方法基于光子带隙向更短波长的移动，其中在0至20 kGy剂量范围内暴露于伽马射线辐射会改变（B-co-MP）共聚物的折射率。拟合的实验数据、布鲁格曼有效介质方程和传输矩阵法（TMM）是当前理论方法框架中的主要核心内容。收集的数据表明，在可见光范围内，所建议的传感器灵敏度（224 nm/RIU）在0至20 kGy的应用剂量范围内较高且稳定。此外，我们将这些结果与先前的研究进行了比较。
