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We present a simulation-based and experimental study propagating broadband terahertz vortex beams generated by a spiral phase plate. Numerical simulation based on scalar diffraction theory was used to obtain the spatial amplitude and phase distributions of the broadband (0.1 to 2.5 THz) vortex beam at different distances from the spiral phase plate. For experimental studies, THz pulse time-domain...
In this work digital holographic method has been used for investigations of plant cell heating process. An analysis of obtained phase images has been performed and major sources of the observed phase shift were determined.
Terahertz pulse time-domain holography (THz PTDH) is the powerful technique for high-resolution amplitude and phase THz imaging that allows mapping spectroscopic information across the imaged object. In this paper, we consider most sought after applications of phase imaging provided by this technique and experimentally demonstrate the ability of the method to reconstruct smooth and stepped relief...
In this work we demonstrate the field of view expansion in off-axis time-resolved femtosecond digital holography and investigate issues of stitching the subholograms.
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