TITLE

Continuous-wave all-optoelectronic terahertz imaging

AUTHOR(S)
Siebert, Karsten J.; Quast, Holger; Leonhardt, Rainer; Lo¨ffler, Torsten; Thomson, Mark; Bauer, Tobias; Roskos, Hartmut G.; Czasch, Stephanie
PUB. DATE
April 2002
SOURCE
Applied Physics Letters;4/22/2002, Vol. 80 Issue 16, p3003
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
6494745

 

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