Single-shot ultrafast terahertz photography

Junliang Dong (), Pei You, Alessandro Tomasino, Aycan Yurtsever and Roberto Morandotti ()
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Junliang Dong: Centre Énergie Matériaux Télécommunications
Pei You: Centre Énergie Matériaux Télécommunications
Alessandro Tomasino: Centre Énergie Matériaux Télécommunications
Aycan Yurtsever: Centre Énergie Matériaux Télécommunications
Roberto Morandotti: Centre Énergie Matériaux Télécommunications

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Multidimensional imaging of transient events has proven pivotal in unveiling many fundamental mechanisms in physics, chemistry, and biology. In particular, real-time imaging modalities with ultrahigh temporal resolutions are required for capturing ultrashort events on picosecond timescales. Despite recent approaches witnessing a dramatic boost in high-speed photography, current single-shot ultrafast imaging schemes operate only at conventional optical wavelengths, being suitable solely within an optically-transparent framework. Here, leveraging on the unique penetration capability of terahertz radiation, we demonstrate a single-shot ultrafast terahertz photography system that can capture multiple frames of a complex ultrafast scene in non-transparent media with sub-picosecond temporal resolution. By multiplexing an optical probe beam in both the time and spatial-frequency domains, we encode the terahertz-captured three-dimensional dynamics into distinct spatial-frequency regions of a superimposed optical image, which is then computationally decoded and reconstructed. Our approach opens up the investigation of non-repeatable or destructive events that occur in optically-opaque scenarios.

Date: 2023
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DOI: 10.1038/s41467-023-37285-3

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