Abstract-Possibility of direct estimation of terahertz pulse electric field

Alexander V. Borodin, Mikhail N. Esaulkov, Alexander A. Frolov, Alexander P. Shkurinov, and Vladislav Ya. Panchenko  »View Author Affiliations

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-14-4092

Optics Letters, Vol. 39, Issue 14, pp. 4092-4095 (2014)
http://dx.doi.org/10.1364/OL.39.004092

In this Letter, we introduce a new method of estimation of the terahertz (THz) field amplitude. This method uses second-harmonic generation (SHG) in the presence of THz and DC fields in gaseous media. We take into account contributions from both nonionized molecules and free plasma electrons to the nonlinear process of SHG. We analyze the applicability of this method of detection to obtaining correct information on the waveform and amplitude of broadband THz pulses.

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