Illegal drugs sensor: Performance evaluation and identification based on terahertz photonic crystal fiber - Kayab Khandakar; Jabin Tasnin Upoma; Taib Hasan; A. H. M. Iftekharul Ferdous; Diponkar Kundu; Md. Omar Faruk; Md. Feroz Ali; Md. Shahorin Islam Shaun (PLoS ONE, 2025)