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Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
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Contributed review: quantum cascade laser based photoacoustic detection of explosives
1Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei, China.
The Review of Scientific Instruments
|April 3, 2015
Summary
External cavity quantum cascade lasers (EC-QCLs) offer promising optical sensing for detecting trace explosives. This review highlights technical advancements in EC-QCL-based photoacoustic spectroscopy for security applications.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Laser Technology
Background:
- Public security necessitates advanced trace explosive detection methods.
- Optical sensing, particularly mid-infrared spectrometry, shows significant potential.
- External cavity quantum cascade lasers (EC-QCLs) are key spectroscopic sources due to their advantageous properties.
Purpose of the Study:
- To review technical progress in EC-QCL-based photoacoustic spectroscopy for explosives detection.
- To assess the potential of this technique for both close-contact and standoff explosive detection.
Main Methods:
- Review of technical advancements in EC-QCL-based photoacoustic spectroscopy.
- Analysis of applications in trace explosives detection over the past decade.
Main Results:
- EC-QCLs are suitable spectroscopic sources for analytical instrumentation.
- Photoacoustic spectroscopy utilizing EC-QCLs demonstrates potential for explosives detection.
Conclusions:
- EC-QCL-based photoacoustic spectroscopy is a developing technique for explosives detection.
- The technology shows promise for both near-field and remote sensing applications in public security.
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