Abstract-Nonlinear TeraHertz Transmission by Liquid Water at 1 THz

Fabio Novelli, Chun Yu Ma,Nidhi Adhlakha,Ellen M. Adams,Thorsten Ockelmann ,Debasish Das Mahanta,Paola Di Pietro, Andrea Perucchi, Martina Havenith

https://www.mdpi.com/2076-3417/10/15/5290

The solvation properties of liquid water originate from the transient network of hydrogen-bonded molecules. In order to probe the coupling between the different modes of this network, nonlinear terahertz (THz) spectroscopy techniques are required. Ideally, these techniques should use a minimal volume and capitalize on sensitive field-resolved detection. Here we performed open aperture z-scan transmission experiments on static liquid cells, and detect the THz fields with electro-optical techniques. We show that it is possible to quantify the nonlinear response of liquid water at ~1 THz even when large signals originate from the sample holder windows