Infrared to terahertz identification of chemical substances used for the production of IEDs

Research of ultra-narrow band filters based on silicon nitride subwavelength grating used in terahertz detection techniques

“…THz waves lie between infrared and microwave, in the transition stage from macro electronics to micro photonics. Because THz wave has the characteristics of penetration, security, broadband, transient, coherence and so on, it has aroused great interest in the application of imaging [1][2][3], security [4,5], biomolecular detection [6], chemical process research [7][8][9] and other fields.…”