Single-shot multi-frame ultrafast terahertz imaging method and system

A system for single-shot multi-frame ultrafast terahertz imaging of a scene, the system comprising:

• a laser producing a pump beam and a probe beam;
• a THz generator generating a THz beam from said pump beam, the THz beam being passed through the scene;
• a multiplexer selected for multiplexing the probe beam in the time domain and in the spatial-frequency domain, yielding a multiplexed probe beam;
• a THz detector detecting a THz beam passing through the scene;
• a first optical lens guiding the multiplexed probe beam to the THz detector;
• a polariser selected for conversion of the multiplexed probe beam into mutually orthogonal linear polarized beams;
• a camera;
• and
• a second optical lens selected for directing the mutually orthogonal linear polarized beams to the camera.