Background: Cyanide is an immensely poisonous chemical that is exceedingly noxious
to the human body.
Methods: Considering this issue, we present a Rectangular core photonic crystal fiber (RPCF) to
detect the cyanide. Zeonex is chosen as base material and the investigation is accomplished in the
terahertz (THz) frequency region.
Results: The RPCF model proffers high sensitivity, enlarged effective area, and insignificant confinement
Conclusion: It is very worthy to note that the proposed model structure can be fabricated by applying
the existing fabrication techniques.