System and method for parametric detection of broadband terahertz pulses

A system for terahertz pulse detection, the system comprising:

• an optical medium having an upper face, a first side face, and a second side face opposite the first side face, the optical medium made of a nonlinear material;
• a broadband laser source configured to emit a plurality of laser pulses towards the first side face of the optical medium, along a first direction normal to the first side face;
• a terahertz radiation emitter configured to emit terahertz radiation towards the upper face of the optical medium, along a second direction at a first non-zero angle relative to the first direction, the plurality of laser pulses and the terahertz radiation configured to synchronously propagate within the optical medium and to interact with one another and with the optical medium to generate a plurality of up-converted signals that exit the optical medium at the second side face, along a plurality of third directions at a plurality of respective second non-zero angles relative to the first direction;
• and
• an image acquisition device configured to capture at least one image of the plurality of up-converted signals.