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Optics Express, volume 27, issue 8, pages 10419

High Kerr nonlinearity of water in THz spectral range

Publication typeJournal Article
Publication date2019-04-01
Journal: Optics Express
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.8
ISSN10944087
Atomic and Molecular Physics, and Optics
Abstract
The values of the nonlinear refractive index coefficient for various materials in the terahertz frequency range exceed the ones in both visible and NIR ranges by several orders of magnitude. This allows to create nonlinear switches, modulators, systems requiring lower control energies in the terahertz frequency range. We report the direct measurement of the nonlinear refractive index coefficient of liquid water by using the Z-scan method with broadband pulsed THz beam. Our experimental result shows that nonlinear refractive index coefficient in water is positive and can be as large as 7×10-10 cm2/W in the THz frequency range, which exceeds the values for the visible and NIR ranges by 6 orders of magnitude. To estimate n2, we use the theoretical model that takes into account ionic vibrational contribution to the third-order susceptibility. We show that the origins of the nonlinearity observed are the anharmonicity of molecular vibrations.

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GOST Copy
Tcypkin A. N. et al. High Kerr nonlinearity of water in THz spectral range // Optics Express. 2019. Vol. 27. No. 8. p. 10419.
GOST all authors (up to 50) Copy
Tcypkin A. N., Melnik M., Zhukova M. O., Vorontsova I. O., Putilin S. E., Kozlov S. A., Zhang X. High Kerr nonlinearity of water in THz spectral range // Optics Express. 2019. Vol. 27. No. 8. p. 10419.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1364/OE.27.010419
UR - https://doi.org/10.1364%2FOE.27.010419
TI - High Kerr nonlinearity of water in THz spectral range
T2 - Optics Express
AU - Melnik, Maksim
AU - Zhukova, Maria O.
AU - Putilin, Sergey E.
AU - Zhang, Xi-Cheng
AU - Tcypkin, Anton N.
AU - Kozlov, Sergei A
AU - Vorontsova, Irina O
PY - 2019
DA - 2019/04/01 00:00:00
PB - Optical Society of America
SP - 10419
IS - 8
VL - 27
SN - 1094-4087
ER -
BibTex |
Cite this
BibTex Copy
@article{2019_Tcypkin,
author = {Maksim Melnik and Maria O. Zhukova and Sergey E. Putilin and Xi-Cheng Zhang and Anton N. Tcypkin and Sergei A Kozlov and Irina O Vorontsova},
title = {High Kerr nonlinearity of water in THz spectral range},
journal = {Optics Express},
year = {2019},
volume = {27},
publisher = {Optical Society of America},
month = {apr},
url = {https://doi.org/10.1364%2FOE.27.010419},
number = {8},
pages = {10419},
doi = {10.1364/OE.27.010419}
}
MLA
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MLA Copy
Tcypkin, Anton N., et al. “High Kerr nonlinearity of water in THz spectral range.” Optics Express, vol. 27, no. 8, Apr. 2019, p. 10419. https://doi.org/10.1364%2FOE.27.010419.
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