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System and method for identifying materials using a THz spectral fingerprint in a media with high water content

  • US 10,401,283 B2
  • Filed: 05/22/2017
  • Issued: 09/03/2019
  • Est. Priority Date: 12/17/2012
  • Status: Active Grant
First Claim
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1. A system to detect a material, comprising:

  • a pulse generator to generate a terahertz pulse to excite molecules in the material and induce coherent bleaching to allow the terahertz pulse to penetrate to depths in the material and to cause a reflected pulse having spectral components in the terahertz region to be generated, wherein the characteristics of the reflected pulse are dependent upon the properties of the material being illuminated;

    an antenna/diode detector array comprising a plurality of antenna/diode detector sensors tuned to detect terahertz frequencies in the reflected pulse;

    a processor to perform statistical analysis and signal processing on the detected terahertz frequencies to particularly identify the detected frequencies; and

    a database of frequencies and corresponding materials to which the identified frequencies are compared to identify the material.

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