Ultrafast Science / 2021 / Article / Fig 12

Review Article

Broadband THz Sources from Gases to Liquids

Figure 12

THz generation from liquids with different polarity indices. (a) THz fields generated from four liquids, which are α-pinene, p-xylene, ethanol, and water. Their polarity indices are 0, 2.4, 5.2, and 9, respectively. (b) Corresponding spectra.