Analytical Gas Sensing in the Terahertz Spectral Range

Area of Science:

• Physics and Chemistry
• Environmental Science
• Biomedical Engineering

Background:

• Terahertz (THz) electromagnetic spectrum utilization is growing across scientific fields.
• THz technology shows promise for gas analysis in astronomy, biomedicine, and chemical analysis.
• Environmental monitoring of hazardous and toxic gases is a key emerging application for THz technology.

Purpose of the Study:

• To provide an overview of THz gas detection analytical methods for environmental and biomedical applications.
• To explain the fundamental principles of THz radiation interaction with gases and the atmosphere.
• To review the application of THz spectrometry for analyzing specific gaseous species and air pollutants.

Main Methods:

• Review of existing literature on THz gas detection techniques.
• Analysis of THz spectrometry for various gaseous species and air pollutants.
• Discussion of the interaction mechanisms between THz radiation and atmospheric gases.

Main Results:

• THz spectrometry enables the analysis of numerous gaseous species and air pollutants.
• Different THz detection methods offer complementary capabilities for gas analysis.
• High selectivity, specificity, and sensitivity are achievable with THz detection.

Conclusions:

• THz detection methods provide unique capabilities for identifying and quantifying air pollutants.
• THz technology facilitates further advancements and new applications in environmental and biomedical fields.
• Complementary THz techniques enhance the detection of both gaseous and particulate air pollutants.