Article
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Cubic Nonlinearity of Graphene-Oxide Monolayer
Version 1
: Received: 22 August 2023 / Approved: 22 August 2023 / Online: 23 August 2023 (09:44:25 CEST)
A peer-reviewed article of this Preprint also exists.
Cubic Nonlinearity of Graphene-Oxide Monolayer. Materials 2023, 16, 6664. Cubic Nonlinearity of Graphene-Oxide Monolayer. Materials 2023, 16, 6664.
Abstract
The cubic nonlinearity of graphene oxide (GO) monolayer was characterized by open and closed Z-scan using a nano-second laser of 10 Hz repetition rate with a Gaussian spatial beam profile. The reverse saturable absorption or positive nonlinearity from open Z-scan and valley-peak traces or positive nonlinearity from closed Z-scan was displayed. The reverse saturable absorption could be from a two-photon or two-step excitation process due to the larger absorption in the lower visible and upper UV wavelength region compared with the excitation source. The nonlinear absorption and nonlinear refraction coefficient were estimated to be ~ 2.62x10-8 m/W and 3.9x10-15 m2/W, respectively. This study also reveals the effect of nonlinear absorption on nonlinear refraction traces.
Keywords
One-photon; two-photon transition; Atomic layer; Nonlinear absorption; Nonlinear refraction
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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