Zaky Zaky A, Panda Abinash, Pukhrambam Puspa D, Aly Arafa H
TH-PPM Group, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62521, Egypt.
Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, Assam, 788010, India.
Sci Rep. 2022 Mar 8;12(1):3754. doi: 10.1038/s41598-022-07461-4.
These analyses present a novel magnetized cold plasma-based 1D photonic crystal structure for detecting the refractive index of various bio-analytes. The proposed structure is designed with two photonic crystals composed of an alternating layer of right-hand polarization and left-hand polarization of the magnetized cold plasma material with a central defect layer. Transmittance characteristics of the structure are studied by employing the well-known transfer matrix method. Various geometrical parameters such as electron density, external magnetic field, thickness of odd and even layers of the multilayers, thickness of the sample layer, and incident angle are judiciously optimized to attain the best sensitivity, figure of merit, quality factor, signal-to-noise ratio, detection range and limit of detection. Finally, a maximum sensitivity of 25 GHz/RIU is accomplished with the optimized value of structure parameters, which can be considered as a noteworthy sensing performance.
这些分析提出了一种基于磁化冷等离子体的新型一维光子晶体结构，用于检测各种生物分析物的折射率。所提出的结构由两个光子晶体组成，这两个光子晶体由磁化冷等离子体材料的右手极化和左手极化交替层以及一个中心缺陷层构成。通过采用著名的传输矩阵法研究了该结构的透射特性。对各种几何参数，如电子密度、外部磁场、多层奇数层和偶数层的厚度、样品层的厚度以及入射角进行了合理优化，以获得最佳灵敏度、品质因数、质量因子、信噪比、检测范围和检测限。最后，通过结构参数的优化值实现了25 GHz/RIU的最大灵敏度，这可被视为一项值得注意的传感性能。
