Physical Review Applied, volume 15, issue 5, publication number 054009

Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies

2
 
The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
3
 
Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
Publication typeJournal Article
Publication date2021-05-05
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor4.6
ISSN23317019
General Physics and Astronomy
Abstract
The nonlinear response of liquids in the terahertz regime has recently attracted significant interest, even though very few measurements have been reported. Here, we report on our measurements based on a zscan technique of the nonlinear refractive-index coefficient n2 at terahertz frequencies for several liquids with noncentrosymmetric molecules, specifically, water, ethanol, and α-pinene. We describe how the value of n2 depends on the physical parameters of these molecules. The measured values of n2 of the liquids in the terahertz region are as much as 6 orders of magnitude larger than their corresponding values in the visible or near-IR. Through a simple theoretical model, we confirm that the predominant source of this large third-order nonlinearity is the second-order perturbative component of the vibrational response of these molecules, which have resonances in the mid-IR.

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Tcypkin A. N. et al. Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies // Physical Review Applied. 2021. Vol. 15. No. 5. 054009
GOST all authors (up to 50) Copy
Tcypkin A. N., Zhukova M. O., Melnik M., Vorontsova I., Kulya M., Putilin S., Putilin S. E., Kozlov S., Choudhary S., Boyd R. W. Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies // Physical Review Applied. 2021. Vol. 15. No. 5. 054009
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevApplied.15.054009
UR - https://doi.org/10.1103%2FPhysRevApplied.15.054009
TI - Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies
T2 - Physical Review Applied
AU - Tcypkin, Anton N.
AU - Zhukova, Maria O.
AU - Melnik, Maksim
AU - Vorontsova, Irina
AU - Kulya, M.S.
AU - Putilin, Sergey
AU - Kozlov, S.
AU - Choudhary, Saumya
AU - Boyd, Robert W.
AU - Putilin, Sergey E.
PY - 2021
DA - 2021/05/05 00:00:00
PB - American Physical Society (APS)
IS - 5
VL - 15
SN - 2331-7019
ER -
BibTex
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BibTex Copy
@article{2021_Tcypkin,
author = {Anton N. Tcypkin and Maria O. Zhukova and Maksim Melnik and Irina Vorontsova and M.S. Kulya and Sergey Putilin and S. Kozlov and Saumya Choudhary and Robert W. Boyd and Sergey E. Putilin},
title = {Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies},
journal = {Physical Review Applied},
year = {2021},
volume = {15},
publisher = {American Physical Society (APS)},
month = {may},
url = {https://doi.org/10.1103%2FPhysRevApplied.15.054009},
number = {5},
doi = {10.1103/PhysRevApplied.15.054009}
}
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