Ultrafast Science / 2021 / Article / Fig 1

Review Article

Broadband THz Sources from Gases to Liquids

Figure 1

A typical THz two-color air plasma system. The laser beam is split into the pump beam and probe beam. The air plasma is produced by focusing the pump beam. One BBO crystal is inserted to create the second harmonic pulse. The THz signal is detected via electro-optic sampling (EOS).