Speaker
Description
Precise, single-shot visualization of the full vectorial structure of THz electromagnetic wave packets, including their complex amplitude, polarization state, and associated magnetic fields, is essential for advancing materials electromagnetics and accelerator physics. However, existing THz diagnostic techniques typically recover only partial field components, leaving the complete three-dimensional spatiotemporal structure inaccessible.
Here, we present a method that enables full 3D reconstruction of THz electromagnetic wave packets from a single shot. By integrating electro-optic sampling with a high-dimensional one-shot optical field compressive sensing (HOOCS) system, our approach retrieves the complete THz electric-field vector with high temporal fidelity. We demonstrate this capability by mapping the 3D homogeneous THz field produced via optical rectification and the 3D radially polarized THz field emitted by a 30-MeV relativistic electron bunch at Osaka University, enabling direct reconstruction of the bunch’s spatiotemporal profile.
This technique establishes a general framework for high-dimensional THz field detection and paves the way for applications in THz ellipsometry and real-time visualization of relativistic electron dynamics.
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