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2019
Paper (Preprint, Research Paper, Review Paper, White Paper, etc.)
Title

Terahertz Quantum Sensing

Title Supplement
Published on arXiv
Abstract
Quantum sensing is highly attractive for accessing spectral regions in which the detection of photons is technically challenging: sample information is gained in the spectral region of interest and transferred via biphoton correlations into another spectral range, for which highly sensitive detectors are available. This is especially beneficial for terahertz radiation, where no semiconductor detectors are available and coherent detection schemes or cryogenically cooled bolometers have to be employed. Here, we report on the first demonstration of quantum sensing in the terahertz frequency range in which the terahertz photons interact with a sample in free space and information about the sample thickness is obtained by the detection of visible photons. As a first demonstration, we show layer thickness measurements with terahertz photons based on biphoton interference. As non-destructive layer thickness measurements are of high industrial relevance, our experiments might be seen as a first step towards industrial quantum-sensing applications.
Author(s)
Kutas, M.
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Haase, B.
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Bickert, P.
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Riexinger, F.
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Molter, D.
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Freymann, G. von
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Project(s)
QUILT
Funder
Fraunhofer-Gesellschaft FhG
Link
Link
Language
English
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Keyword(s)
  • quantum physics

  • optics

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