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Terahertz confocal microscopy with a quantum cascade laser source

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  • Ugo Siciliani De Cumis
  • Ji Hua Xu
  • Luca Masini
  • Riccardo Degl'Innocenti
  • Pasqualantonio Pingue
  • Fabio Beltram
  • Alessandro Tredicucci
  • Miriam S. Vitiello
  • Pier Alberto Benedetti
  • Harvey E. Beere
  • David A. Ritchie
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<mark>Journal publication date</mark>24/09/2012
<mark>Journal</mark>Optics Express
Issue number20
Volume20
Number of pages8
Pages (from-to)21924-21931
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We report on the implementation of a confocal microscopy system based on a 2.9 THz quantum cascade laser source. Lateral and axial resolutions better than 70 μm and 400 μm, respectively, are achieved, with a large contrast enhancement compared to the non-confocal arrangement. The capability of resolving overlapping objects lying on different longitudinal planes is also clearly demonstrated.