THz-Raman: accessing molecular structure with Raman spectroscopy for enhanced chemical identification, analysis, and monitoring

Randy A. Heyler; James T. A. Carriere; Frank Havermeyer

doi:10.1117/12.2018136

29 May 2013 THz-Raman: accessing molecular structure with Raman spectroscopy for enhanced chemical identification, analysis, and monitoring

Randy A. Heyler, James T. A. Carriere, Frank Havermeyer

Author Affiliations +

Proceedings Volume 8726, Next-Generation Spectroscopic Technologies VI; 87260J (2013) https://doi.org/10.1117/12.2018136
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Structural analysis via spectroscopic measurement of rotational and vibrational modes is of increasing interest for many applications, since these spectra can reveal unique and important structural and behavioral information about a wide range of materials. However these modes correspond to very low frequency (~5cm^-1 - 200cm^-1, or 150 GHz-6 THz) emissions, which have been traditionally difficult and/or expensive to access through conventional Raman and Terahertz spectroscopy techniques. We report on a new, inexpensive, and highly efficient approach to gathering ultra-low-frequency Stokes and anti-Stokes Raman spectra (referred to as “THz-Raman”) on a broad range of materials, opening potential new applications and analytical tools for chemical and trace detection, identification, and forensics analysis. Results are presented on explosives, pharmaceuticals, and common elements that show strong THz-Raman spectra, leading to clear discrimination of polymorphs, and improved sensitivity and reliability for chemical identification.

Citation Download Citation

Randy A. Heyler, James T. A. Carriere, and Frank Havermeyer "THz-Raman: accessing molecular structure with Raman spectroscopy for enhanced chemical identification, analysis, and monitoring", Proc. SPIE 8726, Next-Generation Spectroscopic Technologies VI, 87260J (29 May 2013); https://doi.org/10.1117/12.2018136

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