Issue 47, 2020

Hyper–Rayleigh scattering in 2D redox exfoliated semi-metallic ZrTe2 transition metal dichalcogenide

Abstract

Nonlinear optical characterization of nanostructured layered transition metal dichalcogenides (LTMDs) is of fundamental interest for basic knowledge and applied purposes. In particular, second-order optical nonlinearities are the basis for second harmonic generation as well as sum or difference frequency generation and have been studied in some 2D TMDs, especially in those with a semiconducting character. Here we report, for the first time, on the second-order nonlinearity of the semi-metallic ZrTe2 monolayer in acetonitrile suspension (concentration of 4.9 × 1010 particles per cm3), synthesized via a modified redox exfoliation method and characterized using the Hyper–Rayleigh scattering technique in the nanosecond regime. The orientation-averaged first-hyperpolarizability was found to be β(2ω) = (7.0 ± 0.3) × 10−24 esu per ZrTe2 monolayer flake, the largest reported so far. Polarization-resolved measurements were performed in the monolayer suspension and indicate the dipolar origin of the generated incoherent second harmonic wave.

Graphical abstract: Hyper–Rayleigh scattering in 2D redox exfoliated semi-metallic ZrTe2 transition metal dichalcogenide

Supplementary files

Article information

Article type
Paper
Submitted
11 Sep 2020
Accepted
23 Nov 2020
First published
23 Nov 2020

Phys. Chem. Chem. Phys., 2020,22, 27845-27849

Hyper–Rayleigh scattering in 2D redox exfoliated semi-metallic ZrTe2 transition metal dichalcogenide

M. L. da Silva-Neto, R. Barbosa-Silva, C. B. de Araújo, C. J. S. de Matos, A. M. Jawaid, A. J. Ritter, R. A. Vaia and A. S. L. Gomes, Phys. Chem. Chem. Phys., 2020, 22, 27845 DOI: 10.1039/D0CP04821F

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