TITLE

Terahertz-field-induced second-harmonic generation in a beta barium borate crystal and its application in terahertz detection

AUTHOR(S)
Jian Chen; Pengyu Han; Zhang, X.-C.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p011118
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the observation of terahertz-field-induced second-harmonic (TFISH) generation in a beta barium borate (β-BBO) crystal based on a four-wave-mixing process. Using the conventional second-harmonic generation in the β-BBO crystal as a local oscillator, the crossed term between the TFISH and the local oscillator is proportional to the terahertz field. This phenomenon is used for coherent detection of intense terahertz waves, where a good linear response is observed for terahertz fields up to 160 kV/cm. In comparison, deviation from linear response and strong waveform distortion are observed when a 0.5-mm-thick ZnTe detector is used to characterize the same terahertz field.
ACCESSION #
43158423

 

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