Inhalt: | The inherent advantages and potential payoffs of the terahertz (THz) regime for military and security applications serve as an important driver for interest in new THz-related science and technology. In particular, the very rapid growth in more recent years is arguably most closely linked to the potential payoffs of THz sensing and imaging (THz-S&I). This book presents some of the leading fundamental research efforts towards the realization of practical THz-S&I capabilities for military and security applications. Relevant subjects include theoretical prediction and/or measurement of THz spectroscopic phenomenon in solid-state materials such as high explosives (e.g. HMX, PETN, RDX, TNT, etc.), carbon-fiber composites, biological agents (e.g. DNA, RNA, proteins, amino acids) and organic-semiconductor nanostructures. Individual papers also address the effective utilization of state-of-the-art THz-frequency technology in military and security relevant scenarios such as standoff S&I, screening of packages and personnel, and perimeter defense. Technical papers introduce novel devices and/or concepts that enhance THz source and detector performance, enabling completely new types of sensor functionality at THz frequency (e.g. detection at nanoscale/molecular levels), and defining new and innovative sensing modalities (e.g. remote personnel identification) for defense and security. Therefore, the collective research presented here represents a valuable source of information on the evolving field of THz-S&I for military and security applications. Sample Chapter(s). Foreword (106 KB). Chapter 1: Development of Computational Methodologies for the Prediction and Analysis of Solid-State Terahertz Spectra (1,347 KB). Contents: Fire Damage on Carbon Fiber Materials Characterized by THz Waves (N Karpowicz et al.); Fingerprinting Insulins in the Spectral Region Intro -- CONTENTS -- Foreword -- Development of Computational Methodologies for the Prediction and Analysis of Solid-state Terahertz Spectra D. G. Allis and T. M. Korter -- 1. Introduction -- 2. Methods -- 3. Results -- 3.1. Adjustable Parameters in the DMof Code -- 3.2. Intensity Calculations from Mulliken and Hirshfeld Charges -- 3.3. A Review of the Functional Comparisons -- 3.4. A Review of the Isolated-Molecule vs. Solid-Stute Normal Mode Frequencies -- 3.5. Basis Set and Integration Grid Size Dependencies -- 3.6. Analysis of the PHMX Calculations -- 3.7. Analysis of the PETN I Calculations -- 4. Discussion -- 4.1. Basis Set and Integration Grid Dependencies -- 4.2. Mulliken and Hirsh feld Charge Dependencies -- 4.3. Timings -- 5. Conclusions -- 6. Acknowledgments -- References -- Fire Damage on Carbon Fiber Materials Characterized by THz Waves N . Karpowicz, D. Dawes, M. J . Perry and X.-C. Zhang -- 1. Introduction -- 2. Experimental Setups -- 3. Continuous-wave imaging -- 4. THz Time-Domain Spectroscopy Measurements -- 5. Conclusion -- 6. Acknowledgements -- References -- An Analysis of the THz Frequency Signatures in the Cellular Components of Biological Agents A. Bykhovski, T. Globus, T. Khromova, B. Gelmont and D. Woolard -- 1. Introduction -- 2. Theory -- 2.1. Model description -- 2.2. Simulation results -- 3. Materials and methods -- 4. Experimental results -- 4.1. THz characterization of E-coli 's transfer RNA diluted solutions. -- 5. Experiment v theory -- 6. Acknowledgments -- References -- Standoff Sensing and Imaging of Explosive Related Chemical and Bio-Chemical Materials Using THz-TDS H. Zhong, A . Redo-Sanchez and X.-C. Zhang -- 1. Introduction -- 2. Principle -- 2.1. Standoff sensing of RDX -- 2.1.1. Signature of RDX at close proximity -- 2.1.2. Sensing of RDXat standoffdistance. |
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