Spectral and angular dependence of mid-infrared diffuse scattering from explosives residues for standoff detection using external cavity quantum cascade lasers

Jonathan D. Suter, Bruce Bernacki, Mark C. Phillips

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

We present a study of the spectral and angular dependence of scattered mid-infrared light from surfaces coated with explosives residues (TNT, RDX, and tetryl) detected at a 2 m standoff distance. An external cavity quantum cascade laser provided tunable illumination between 7 and 8 lm. Important differences were identified in the spectral features between specular reflection and diffuse scattering which will impact most practical testing scenarios and complicate material identification. We discuss some of the factors influencing the dependence of observed spectra on the experimental geometry.

Original languageEnglish (US)
Pages (from-to)965-974
Number of pages10
JournalApplied Physics B: Lasers and Optics
Volume108
Issue number4
DOIs
StatePublished - Sep 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • General Physics and Astronomy

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