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Direct observation of THz Kerr Effect (TKE) in deionized, distilled and buffered (PBS) water.

Abstract

Nonlinear THz pump – optical probe (THz – OKE) measurements in deionized, distilled and buffered (PBS) water are reported. A laser system that produces pulses at 800 nm, 30 fs FWHM, at the repetition rate of 1 kHz and energy of 6 μJ/pulse, was a source of the probe optical beam and of the pump beam of THz 2 ps pulses. The electric field strength inducing the birefringence in water samples amounted to ETHz = 1.35*106 V/m. These samples were chosen in order to study the effect of ionic concentration on water behavior on the ultrafast time scale. Differentiation between ultrafast effects resulting from internal H2O properties and those resulting from H2O – ions interactions was analyzed. These two effects may be connected to a difference in the fluctuations of the network of intermolecular hydrogen bonds of water molecules in the presence or absence of ions in solution. The results indicate that such fluctuations significantly alter water birefringence amplitude and its dynamics.

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Publication details

The article was received on 16 Jun 2017, accepted on 07 Sep 2017 and first published on 08 Sep 2017


Article type: Paper
DOI: 10.1039/C7CP04061J
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Direct observation of THz Kerr Effect (TKE) in deionized, distilled and buffered (PBS) water.

    S. Sarbak, G. Sharma, C. Joseph, W. Kucia, K. Dobek, R. H. Giles and A. Dobek, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP04061J

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