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Proceedings Paper

Air-breakdown coherent detection of terahertz using controlled optical bias
Author(s): Chia-Yeh Li; Denis V. Seletskiy; Mansoor Sheik-Bahae
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Paper Abstract

Detection of the electric field induced second harmonic (EFISH) signal has been used in gas plasma for measurement of the symmetry-breaking THz transients. Previously, detection linearity with the THz field was accomplished by either mixing EFISH signal with a second harmonic component of an octave-spanning plasma supercontinuum or by addition of a high voltage DC bias across the plasma. Here we report a new method where controlled injection of the second harmonic signal provides the necessary bias for the coherent signal detection. This is accomplished simply by insertion of the BBO crystal in an optical path. The absence of high intensity or high voltage makes the detection scheme more viable for remote sensing.

Paper Details

Date Published: 14 March 2013
PDF: 6 pages
Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 86231V (14 March 2013); doi: 10.1117/12.2003590
Show Author Affiliations
Chia-Yeh Li, The Univ. of New Mexico (United States)
Denis V. Seletskiy, The Univ. of New Mexico (United States)
Univ. Konstanz (Germany)
Mansoor Sheik-Bahae, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 8623:
Ultrafast Phenomena and Nanophotonics XVII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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