Infrared-Terahertz Double-Resonance Spectroscopy of CH3F and CH3Cl at Atmospheric Pressure

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Abstract:

A method for highly selective remote sensing of atmospheric trace polar molecular gases is described. Based on infrared-terahertz double-resonance spectroscopic techniques, the molecule-specific coincidence between the lines of a CO2 laser and rotational-vibrational molecular absorption transitions provide two dimensions of recognition specificity infrared coincidence frequency and the corresponding terahertz frequency whose absorption strength is modulated by the laser.Atmospheric pressure broadening expands the molecular recognition specificity matrix by simultaneously relaxing the infrared coincidence requirement and strengthening the corresponding terahertz signature. Representative double-resonance spectra are calculated for prototypical molecules CH3F and CH3Cl and their principal isotopomers from which a heuristic model is developed to estimate the specificity matrix and double-resonance signature strength for any polar molecule.

Author(s):
Phillips, Dane J. ; Tanner, Elizabeth A. ; De Lucia, Frank C. ; Everitt, Henry O.
Author Organization(s):
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
Descriptive Note:
Journal article
Supplementary Note:
The original document contains color images. Published in Physical Review A, v85 p052507-1/052507-13, 2012.
Pagination:
0016

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-56039-MS.39
Contract/Grant Number(s):
W911NF-09-1-0428
Monitor Series:
56039-MS.39, ARO
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1.2.5_Lessons Learned; JCA_1.2.3_Educating; JCA_5.3_Planning
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Advanced Electronics
Descriptor(s):
*RESONANCE, *SPECTROSCOPY, COINCIDENCE COUNTING, HEURISTIC METHODS, INFRARED RADIATION, MOLECULAR PROPERTIES, MOLECULES, POLAR REGIONS, REPRINTS, REQUIREMENTS, STRENGTH(GENERAL), TRACE GASES
Field(s)/Group(s):
Atomic and Molecular Physics and Spectroscopy
Keyword(s):
PE611102
Report Date:
2012 May 16
Creation Date:
2014 Apr 21