Grantee Research Project Results
Final Report: Development of a New Gas Sensing System Based on Terahertz Time-Domain Spectroscopy
EPA Grant Number: R827122Title: Development of a New Gas Sensing System Based on Terahertz Time-Domain Spectroscopy
Investigators: Mittleman, Daniel M. , Baraniuk, Richard G.
Institution: Rice University
EPA Project Officer: Hahn, Intaek
Project Period: October 1, 1998 through September 30, 2001
Project Amount: $299,817
RFA: Exploratory Research - Environmental Engineering (1998) RFA Text | Recipients Lists
Research Category: Safer Chemicals , Sustainable and Healthy Communities , Land and Waste Management
Objective:
The objective of this research project was to pursue the possibilities for using terahertz (THz) time-domain spectroscopy (TDS) as a tool for trace gas sensing and identification. Much of the challenge in this area involved the development of appropriate signal processing algorithms for extracting information from the measured THz waveforms.
Summary/Accomplishments (Outputs/Outcomes):
We developed several new signal processing approaches for extracting information from THz waveforms. These contributions have been valuable for reasons beyond the fact that they enable new and rapid methods for THz spectroscopy. They also served as a valuable entry point for our continuing development of signal processing tools for the unique time-domain signals generated by the THz-TDS system.
This project also has enabled the Principal Investigator to broaden his relationship with Picometrix, the corporate firm developing a commercial version of the THz spectrometer. As a result, it has been possible for Rice University to serve as a beta-test site for this instrument. This has enabled a number of important experiments, which otherwise would not have been possible.
Journal Articles on this Report : 9 Displayed | Download in RIS Format
Other project views: | All 10 publications | 10 publications in selected types | All 10 journal articles |
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Type | Citation | ||
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Dorney TD, Baraniuk RG, Mittleman DM. Material parameter estimation using terahertz time-domain spectroscopy. Journal of the Optical Society of America A-Optics Image Science and Vision 2001;18(7):1562-1571. |
R827122 (1999) R827122 (Final) |
Exit |
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Dorney TD, Johnson JL, Van Rudd J, Baraniuk RG, Symes WW, Mittleman DM. Terahertz reflection imaging using Kirchhoff migration. Optics Letters 2001;26(19):1513-1515. |
R827122 (Final) |
not available |
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Dorney TD, Symes WW, Baraniuk RG, Mittleman DM. Terahertz multistatic reflection imaging. Journal of the Optical Society of America A - Optics Image Science and Vision 2002;19(7):1432-1442. |
R827122 (Final) |
not available |
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Dorney TD, Rossow MJ, Symes WW, Mittleman DM. Single-cycle terahertz electromagnetic pulses: A new test bed for physical seismic modeling. Geophysics 2003;68(1):308-313. |
R827122 (Final) |
not available |
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Johnson JL, Dorney TD, Mittleman DM. Enhanced depth resolution in terahertz imaging using phase-shift interferometry. Applied Physics Letters 2001;78(6):835-837. |
R827122 (1999) R827122 (Final) |
not available |
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Johnson JL, Dorney TD, Mittleman DM. Interferometric imaging with terahertz pulses. IEEE Journal of Selected Topics in Quantum Electronics 2001;7(4):592-599. |
R827122 (Final) |
not available |
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Van Rudd J, Mittleman DM. Influence of substrate-lens design in terahertz time-domain spectroscopy. Journal of the Optical Society of America B-Optical Physics 2002;19(2):319-329. |
R827122 (Final) |
not available |
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Van Rudd J, Johnson JL, Mittleman DM. Quadrupole radiation from terahertz dipole antennas. Optics Letters 2000;25(20):1556-1558. |
R827122 (1999) R827122 (Final) |
Exit |
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Van Rudd J, Johnson JL, Mittleman DM. Cross-polarized angular emission patterns from lens-coupled terahertz antennas. Journal of the Optical Society of America B-Optical Physics 2001;18(10):1524-1533. |
R827122 (Final) |
not available |
Supplemental Keywords:
innovative technology, engineering, monitoring , air, toxics, 33/50, electron microscopy, engineering, chemistry, physics, environmental chemistry, HAPS, climate change, acetonitrile, benzene, PCBs, terahertz time-domain, trichloroethylene, atmospheric models, electro-optic sensing, environmentally conscious manufacturing, fiber laser, gas-sensing system, greenhouse gas concentrations, industrial solvents, infrared spectroscopy sensor, optical sensor, portable spectrometers., RFA, Scientific Discipline, Air, Toxics, Environmental Chemistry, climate change, HAPS, Engineering, Electron Microscopy, 33/50, Engineering, Chemistry, & Physics, environmentally conscious manufacturing, portable spectrometers, Terahertz time-domain, PCBs, green house gas concentrations, infrared spectroscopy sensor, optical sensor, radiation balance, benzene, Trichloroethylene, gas sensing system, electro-optic sensing, fiber laser, Acetonitrile, industrial solvents, Benzene (including benzene from gasoline)Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.