Applied Physics B

, Volume 89, Issue 2, pp 395–399

THz media characterization by means of coherent homodyne detection, results and potential applications

  • G. Mouret
  • S. Matton
  • R. Bocquet
  • D. Bigourd
  • F. Hindle
  • A. Cuisset
  • J.F. Lampin
  • K. Blary
  • D. Lippens
Article

DOI: 10.1007/s00340-007-2785-5

Cite this article as:
Mouret, G., Matton, S., Bocquet, R. et al. Appl. Phys. B (2007) 89: 395. doi:10.1007/s00340-007-2785-5

Abstract

This paper describes the performance of a coherent homodyne spectrometer to preserve phase information of the THz electric field. Thereby, optical constants of a high resistive silicon sample are presented between 200 GHz and 1.2 THz. The phase shift introduced by such a thick sample is much greater than 2π, and the manner of solving the ambiguity of the modulo 2π is discussed and can be used to surround the refractive index mainly at high frequency where the signal to noise ratio decreases. The analysis of the coherent homodyne signal as a function as the frequency at a fixed delay line permits deduction of sample thickness or measurement of distance without any mechanical displacement, and so facilitates potential ranging and tomography studies.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • G. Mouret
    • 1
  • S. Matton
    • 1
  • R. Bocquet
    • 1
  • D. Bigourd
    • 1
  • F. Hindle
    • 1
  • A. Cuisset
    • 1
  • J.F. Lampin
    • 2
  • K. Blary
    • 2
  • D. Lippens
    • 2
  1. 1.Laboratoire de Physico Chimie de l’Atmosphère, UMR CNRS 8101Université du Littoral Côte d’OpaleDunkerqueFrance
  2. 2.Institut d’Electronique et de Microélectronique de Nanotechnologie, UMR CNRS 8520Université des Sciences et Technologies de LilleVilleneuve d’Ascq CedexFrance