7 GHz resolution waveguide THz spectroscopy of explosives related solids showing new features.
The vibrational modes of the explosive related solids 2,4- and 2,6-DNT have been measured with waveguide THz time-domain spectroscopy (THz-TDS) to unprecedented precision. Dramatic sharpening of spectral features upon cooling beyond 80 K to 12 K is observed, illustrating the high quality and alignment of the polycrystalline thin films. Many of the observed features have linewidths below 15 GHz. These linewidths are approximately 8 times narrower than for the corresponding measurements via conventional THz-TDS with cooled pellets. For the 2,4- DNT, the line narrowing resolved 19 absorption features compared to only 7 features with the corresponding pellet measurement.
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA.
N
N
Laman
S
S
Sree Harsha
D
D
Grischkowsky
Joseph S
JS
Melinger
D053834:Explosive Agents / Q000032:analysis* / Q000737:chemistry*; D008872:Microwaves; D055095:Optics and Photonics; D012637:Security Measures; D013057:Spectrum Analysis / Q000379:methods*
D053834:Explosive Agents