Single-shot detection of terahertz waveforms using non-collinear time-encoding technique

We have developed a new scheme for accurately measuring terahertz (THz) waveforms based on a single-shot method using non-collinear time-encoding technique. In this scheme, THz pulses were focused non-collinearly on a LiNbO3 plate with a Si prism coupler together with chirped sampling pulses, enabling us to spatially separate sum- and difference-frequency components from the detected signals. This new approach single-sideband detection of each component reduces the waveform distortion, and then improves the temporal resolution of the time-encoding technique.