Terahertz pulse time-domain holography (THz PTDH) is an ultimate technique both for the measurement of object properties in the THz range and broadband wavefront sensing. In this proceeding, we reveal the key principles of the technique, including the layout solutions for recording a collimated THz wavefront in the form of spatio-temporal profiles. The possibilities to investigate ultrashort THz field propagation dynamics based on the data measured in one transverse plane is discussed. The evolution for both transverse and longitudinal components of the electromagnetic field thus can be estimated. We illustrate these possibilities on the example of Bessel-Gaussian pulsed THz beam propagation formed by an on axicon lens.

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Maksim S. Kulya, Nikolay S. Balbekin, Andrei Gorodetsky, Sergey A. Kozlov, and Nikolay V. Petrov, "Vectorial terahertz pulse time-domain holography for broadband optical wavefront sensing," Proc. SPIE 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII, 112790D (Presented at SPIE OPTO: February 04, 2020; Published: 2 March 2020); https://doi.org/10.1117/12.2547714.