Single-shot coherent detection of terahertz pulse with broadband spectral coverage

A new scheme using centrosymmetric materials as sensor medium is presented for the single-shot coherence detection of terahertz pulse. The method relies on the electric-field-induced optical second-harmonic generation with linearly chirped optical probe pulse in centrosymmetric medium. The terahertz...

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Bibliographic Details
Published in:Physics of plasmas 2009-04, Vol.16 (4)
Main Authors: Hu, Guang-yue, Lei, An-le, Shen, Baifei, Li, Ru-xin, Xu, Zhi-zhan
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC FIELDS
HARMONIC GENERATION
PLASMA
PLASMA DIAGNOSTICS
PROBES
THZ RANGE
VISIBLE RADIATION
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Summary:A new scheme using centrosymmetric materials as sensor medium is presented for the single-shot coherence detection of terahertz pulse. The method relies on the electric-field-induced optical second-harmonic generation with linearly chirped optical probe pulse in centrosymmetric medium. The terahertz field is encoded onto the frequency spectrum of the second-harmonic pulse and then decoded with appropriate retrieval algorithm. This approach provides a broadband coherent spectroscopic measurement that can cover the entire terahertz gap and has transform-limited temporal resolution, which is mainly limited by the spectral bandwidth of the optical probe pulse. It can be used widely in the experiments of high field plasma physics and the diagnostics of warm dense plasmas.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3125309