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This content will become publicly available on January 12, 2017

Title: Nonlinear electromagnetic interactions in energetic materials

We study the scattering of electromagnetic waves in anisotropic energetic materials. Nonlinear light-matter interactions in molecular crystals result in frequency-conversion and polarization changes. Applied electromagnetic fields of moderate intensity can induce these nonlinear effects without triggering chemical decomposition, offering a mechanism for the nonionizing identification of explosives. We use molecular-dynamics simulations to compute such two-dimensional THz spectra for planar slabs made of pentaerythritol tetranitrate and ammonium nitrate. Finally, we discuss third-harmonic generation and polarization-conversion processes in such materials. These observed far-field spectral features of the reflected or transmitted light may serve as an alternative tool for standoff explosive detection.
Authors:
 [1] ;  [2] ;  [3]
  1. Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering and Birck Nanotechnology Center; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Explosive Science and Shock Physics Division
Publication Date:
OSTI Identifier:
1304812
Report Number(s):
LA-UR--15-27584
Journal ID: ISSN 2331-7019
Grant/Contract Number:
AC52-06NA25396; N00014-11-0466
Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS