Highly Sensitive Photonic Crystal Fiber for Illegal Drugs Detection in THz Regime

Misuse of incentive drugs momentarily and rapidly enhances the functioning of several organs, physiological system, nerves, etc.; the likeliness of sleep disorder; and the release of hormones in extreme level. Drug abuse not only creates momentary effects but also causes fatal damages and acute implications on human health in the long run. These effects imply the necessity of the detection of illegal drugs in an efficient, gentle and unfailing manner along with higher level of obviousness and accuracy. Regarding these as the prime targets, an illegal drug sensor based on PCF has been introduced in this paper. The sensor has been modelled to detect illegal drugs namely Amphetamine, Cocaine, Ketamine and Morphine. The model has been examined in THz regime using COMSOL Multiphysics v.5.4. The background material of the model is Zeonex. The study of the optical properties for the proposed sensor model suggests that the model exhibits an ignorable amount of effective material and confinement loss together with significant values for both effective area and relative sensitivity. The sensor model exhibits increased sensitivity of about 92.33%,90.72%, 94.91 %, and 97.84% at 1.6 THz in detecting Amphetamine, Cocaine, Ketamine and Morphine respectively. Furthermore, existing fabrication methods can be practiced to fabricate the proposed sensor.