Continuous-wave all-optoelectronic terahertz imaging

نویسندگان

  • Karsten J. Siebert
  • Holger Quast
  • Rainer Leonhardt
  • Torsten Löffler
  • Mark Thomson
  • Tobias Bauer
  • Hartmut G. Roskos
  • Stephanie Czasch
چکیده

We present an all-optoelectronic THz imaging system based on photomixing of two continuous-wave laser beams using photoconductive antennas. For a specific biological sample, we compare continuous-wave THz imaging and pulsed THz imaging at 1 THz with respect to data-acquisition time and signal-to-noise ratio, and discuss image formation from both amplitude and phase data. In addition, we introduce the application of hyperboloidal lenses which allow tighter focusing and a corresponding improvement in spatial resolution compared to off-axis paraboloidal mirrors. © 2002 American Institute of Physics. @DOI: 10.1063/1.1469679#

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تاریخ انتشار 2002