Handheld terahertz spectrometer for the detection of liquid explosives

N. Krumbholz, C. Jansen, M. Scheller, T. Müller-Wirts, S. Lübbecke, R. Holzwarth, R. Scheunemann, R. Wilk, B. Sartorius, H. Roehle, D. Stanze, J. Beckmann, L. S. Von Chrzanowski, U. Ewert, M. Koch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Scopus citations


We present a handheld fiber-coupled terahertz spectrometer operating at a center wavelength of 1550 nm. The key elements are a fs-fiber laser, a fiber stretcher delay line and fiber-coupled antennas, which contain novel InAlAs-InGaAs multi layer chips. First experimental data obtained with this system demonstrates its great potential and robustness. In addition, we investigate different hazardous and harmless liquids in reflection geometry. These experiments show that liquids are in principle distinguishable by terahertz spectroscopy. Finally, first steps towards an algorithm that allows for an extraction of the liquids dielectric properties are discussed. The algorithm works for the analysis of reflection data even if the liquid is located inside a containner.

Original languageEnglish (US)
Title of host publicationMillimetre Wave and Terahertz Sensors and Technology II
StatePublished - 2009
Externally publishedYes
EventMillimetre Wave and Terahertz Sensors and Technology II - Berlin, Germany
Duration: Sep 1 2009Sep 3 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherMillimetre Wave and Terahertz Sensors and Technology II

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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