Characterization of the second- and third-order nonlinear optical susceptibilities of monolayer MoS2 using multiphoton microscopy

Author(s):Show less -

Woodward, R. I. ^[1] ; Murray, R. T. ^[1] ; Phelan, C. F. ^[2] ; de Oliveira, R. E. P. ^[2] ; Runcorn, T. H. ^[1] ; Kelleher, E. J. R. ^[1] ; Li, S. ^[3] ; de Oliveira, E. C. ^[2] ; Fechine, G. J. M. ^[2] ; Eda, G. ^[3] ; de Matos, C. J. S. ^[2]

Affiliation

^[1] Imperial Coll London, Dept Phys, Femtosecond Opt Grp, London - England

^[2] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, Sao Paulo - Brazil

^[3] Natl Univ Singapore, Ctr Adv Mat 2D, Singapore - Singapore

• Document type: Journal article
• Source: 2D MATERIALS; v. 4, n. 1 MAR 2017.
• Web of Science Citations: 52

Abstract

We report second- and third-harmonic generation in monolayer MoS2 as a tool for imaging and accurately characterizing the material's nonlinear optical properties under 1560 nm excitation. Using a surface nonlinear optics treatment, we derive expressions relating experimental measurements to second- and third-order nonlinear sheet susceptibility magnitudes, obtaining values of vertical bar chi((2))(s)vertical bar = 2.0 x 10(-20) m(2) V-1 and, for the first time formonolayer MoS2, vertical bar chi((3))(s)vertical bar= 1.7 x 10(-28) m(3) V-2. These sheet susceptibilities correspond to effective bulk nonlinear susceptibility values of vertical bar chi((2))(b)vertical bar= 2.9 x 10(-11m). V-1 and vertical bar chi((3))(b)vertical bar= 2.4 x 10(-19) m(2) V-2, accounting for the sheet thickness. Experimental comparisons between MoS2 and graphene are also performed, demonstrating similar to 3.4 times stronger third order sheet nonlinearity inmonolayer MoS2, highlighting the material's potential for nonlinear photonics in the telecommunications C band. (AU)

• 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
• FAPESP's process: 14/50460-0 - Optical nonlinearity in waveguides and substrates containing graphene and graphene-like materials: a collaboration between the femtosecond Optics Group (fog IC) and the graphene
• Grantee: Christiano José Santiago de Matos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/12734-4 - Design, production and characterization of optical waveguides for plasmid excitation in graphene
• Grantee: Ciaran Phelan
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
• Grantee: Antonio Helio de Castro Neto
• Support Opportunities: Research Projects - SPEC Program