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  • Walsh_EOwithFROG_AppPhysLett_2015

    Rights statement: Copyright 2015 American Institute of Physics. The following article appeared in Applied Physics Letters, 106 (18), 2015 and may be found at http://dx.doi.org/10.1063/1.4919899 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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The time resolved measurement of ultrashort terahertz-band electric fields without an ultrashort probe

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Article number181109
<mark>Journal publication date</mark>05/2015
<mark>Journal</mark>Applied Physics Letters
Issue number18
Volume106
Number of pages4
Publication statusPublished
Original languageEnglish

Abstract

The time-resolved detection of ultrashort pulsed THz-band electric field temporal profiles without
an ultrashort laser probe is demonstrated. A non-linear interaction between a narrow-bandwidth optical probe and the THz pulse transposes the THz spectral intensity and phase information to the optical region, thereby generating an optical pulse whose temporal electric field envelope replicates the temporal profile of the real THz electric field. This optical envelope is characterised via an autocorrelation based FROG (frequency resolved optical gating) measurement, hence revealing the THz temporal profile. The combination of a narrow-bandwidth, long duration, optical probe, and self-referenced FROG makes the technique inherently immune to timing jitter between the optical probe and THz pulse and may find particular application where the THz field is not initially generated via ultrashort laser methods, such as the measurement of longitudinal electron bunch profiles in particle accelerators.

Bibliographic note

Copyright 2015 American Institute of Physics. The following article appeared in Applied Physics Letters, 106 (18), 2015 and may be found at http://dx.doi.org/10.1063/1.4919899 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.