Paper Title: Design and optimization of the perilous chemical sensor in the terahertz frequency range

Abstract: 

Few man-made chemicals are excessively harmful to the human eye, skin, and breathing system. Therefore, the precious detection of these perilous chemicals is highly worthy. A sensor model is presented in this manuscript to sense three dangerous chemicals (Tabun, Soman, Sarin) where Topas is chosen as the fiber material. The optimized model shows enhanced relative sensitivity (94.34% for Sarin, 95.23% for Soman, and 96.12% for Tabun at frequency 2.6 THz). Besides, the effective material loss provided by the reported sensor is noticed to be very tiny (0.00970 cm−1 for Sarin, 0.00988 cm−1 for Soman and 0.01007 cm−1 for Tabun at frequency 2.6 THz) and also, the confinement loss is observed excessively low (only 3.600 × 10-13 cm−1 for Sarin, 3.593 × 10-13 cm−1 for Soman and 3.585 × 10-13 cm−1 for Tabun at frequency 2.6 THz). Moreover, we observe the large effective area (1.665 × 105 µm2 for Sarin, 1.654 × 105 µm2 for Soman and 1.640 × 105 µm2 for Tabun at frequency 2.6 THz) for this chemical sensor. 3D printing can be used to fabricate the presented sensor structure.