Nonlinear optical response of some Graphene oxide and Graphene fluoride derivatives

Abstract

Abstract:The nonlinear optical properties of two graphene derivatives, graphene oxide and graphene fluoride, are investigated by means of the Z-scan technique employing 35 ps and 4 ns, visible (532 nm) laser excitation. Both derivatives were found to exhibit significant third-order nonlinear optical response at both excitation regimes, with the nonlinear absorption being relatively stronger and concealing the presence of nonlinear refraction under ns excitation, while ps excitation reveals the presence of both nonlinear absorption and refraction. Both nonlinear properties are of great interest for several photonics, opto-fluidics, opto-electronics and nanotechnology applications.

Hydrogenated Fluorographene: A 2D Counterpart of Graphane with Enhanced Nonlinear Optical Properties

“…Last, CFH NLO response is dramatically higher (i.e., more than 50 times) than that of GO under visible excitation, while the latter did not exhibit any measurable NLO response in the infrared. 35,47,48 As mentioned earlier, in CFH, sp 2 and sp 3 domains coexist, the former hybridization being associated with graphenic domains and the latter related to both the C−H and C−F bonding. Besides the stoichiometry of the presently prepared and studied CFH, its F content is significantly reduced (C/F = 18:2.8) compared to the fully fluorinated CF (C/F = 1:1.2).…”

“…The presence of H in the new derivative was confirmed using a collection of techniques including infrared spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analysis coupled with evolved gas analysis. Importantly, the new derivative exhibits excellent third-order nonlinear optical response under visible excitation, exceeding by about 1 order of magnitude those of graphene, fluorographene, or even graphene oxide presented elsewhere . To the best of our knowledge, this is among the best nonlinear optical effects observed so far for 2D nanocarbons.…”

“…Importantly, the new derivative exhibits excellent third-order nonlinear optical response under visible excitation, exceeding by about 1 order of magnitude those of graphene, fluorographene, or even graphene oxide presented elsewhere. 35 To the best of our knowledge, this is among the best nonlinear optical effects observed so far for 2D nanocarbons. This could be ascribed to highly polarized regions of donor-π electron-acceptor type within a layer.…”

Enhancing and Tuning the Nonlinear Optical Response and Wavelength-Agile Strong Optical Limiting Action of N-octylamine Modified Fluorographenes

“…However, depending on the excitation wavelength, the pulse duration and the material properties, the observed nonlinear absorption can arise from two-photon absorption (2PA) and/or excited state absorption (ESA). To evaluate the nonlinear absorption coefficient β , the OA Z-scans were fitted by the following equation, described in detail elsewhere [ 37 ]: …”

Graphene Oxide-Based Silico-Phosphate Composite Films for Optical Limiting of Ultrashort Near-Infrared Laser Pulses

“…The optical limiting in carbon-based materials, in particular, in graphene and in its derivatives, has been extensively investigated in the last years [ 14 , 15 , 16 , 17 ]. The optical limiting functionality of these materials, as suspension, film or bulk, has been mainly studied for visible and near-infrared nanosecond and picosecond laser pulses (for wavelengths shorter than 1100 nm) [ 18 , 19 , 20 , 21 ] and, to a lesser extent, for femtosecond laser pulses (mostly at 800 nm wavelength) [ 22 , 23 , 24 , 25 , 26 ]. Very few papers have investigated the nonlinear optical absorption and optical limiting of femtosecond laser pulses in the IR-B band (range, 1.4–3 μm), which includes the wavelength of 1550 nm, important for communications [ 27 , 28 ].…”