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

Author(s)

da Silva-Neto, Manoel L. ^[1] ; Barbosa-Silva, Renato ^[2] ; de Araujo, Cid B. ^{[2, 1]} ; de Matos, Christiano J. S. ^[3] ; Jawaid, Ali M. ^[4] ; Ritter, Allyson J. ^[4] ; Vaia, Richard A. ^[4] ; Gomes, Anderson S. L. ^[2]

Affiliation

^[1] Univ Fed Pernambuco, Grad Program Mat Sci, BR-50670901 Recife, PE - Brazil

^[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil

^[3] Univ Prebiteriana Mackenzie, MackGraphe, BR-01302907 Sao Paulo, SP - Brazil

^[4] Air Force Res Labs, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 - USA

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 22, n. 47, p. 27845-27849, DEC 21 2020.
• Web of Science Citations: 0

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 x 10(10) particles per cm(3)), 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 beta(2 omega) = (7.0 +/- 0.3) x 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. (AU)

• FAPESP's process: 18/25339-4 - Integrated photonics devices
• Grantee: Newton Cesario Frateschi
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/11779-4 - Plasmonic and nonlinear effects in graphene coupled to optical waveguides
• Grantee: Christiano José Santiago de Matos
• Support Opportunities: Research Projects - Thematic Grants