Ultrafast Science / 2021 / Article / Fig 16

Review Article

Broadband THz Sources from Gases to Liquids

Figure 16

Terahertz Kerr effect response on different concentrations [89]. (a) TKE responses of water and NaCl solutions in different concentrations. Inset: an enlarged logarithmic view of the negative polarity responses. (b) The upper panel shows the measured peak-to-peak values (PPV) of TKE responses for NaCl, NaBr, and NaI solutions in different concentrations. The other panels show the extracted maximum values of TKE responses induced by OH…X hydrogen bond vibration (OH…X), the hydrogen bond stretching modes (Stret.), and the hydrogen bond bending (Bend.).