Measurement of the Third-order Nonlinear Susceptibility of Graphene and its Derivatives
Abstract
In this project, saturable absorption and optical Kerr nonlinearity of the atomic layer graphene and CdSe quantum dot doped graphene samples were experimentally measured using the Z-scan method. In addition to measurement of third-order nonlinear optical coefficients of the atomic layer graphene and derivatives, benchmark nonlinear refractive index measurements were performed on carbon disulfide (CS2). Measurements show, in addition of the large saturable absorption, that graphene also has a large nonlinear refractive index, which is several orders of magnitude larger than conventional dielectric nonlinear materials. Enhancement of nonlinear optical response property of graphene-quantum dots (QDs) may be correlated to the charge transfer effect between graphene and QDs. The research findings show that 1) saturable absorption of graphene is strongly enhanced through doping CdSe QDs, and that maximum transmittance change due to saturable absorption can reach up to 70%; 2) depending on concentration, doping can induce large differences in photoluminescence behavior; and 3) by doping, saturable absorber devices can be tailored to the desired nonlinear optics properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2013
- Accession Number
- ADA580214
Entities
People
- Dingyuan Tang
Organizations
- Nanyang Technological University