| Autor: |
Petris A; National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Vasiliu IC; National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Gheorghe P; National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Iordache AM; National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Ionel L; National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Rusen L; National Institute for Laser, Plasma and Radiation Physics, INFLPR, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Iordache S; National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Elisa M; National R&D Institute of Optoelectronics-INOE2000, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania., Trusca R; Department of Science and Engineering of Oxide Materials and Nanomaterials, University POLITEHNICA of Bucharest, 313 Independentei Street, 060042 Bucharest, Romania., Ulieru D; Sitex 45 SRL, 126 A Erou Iancu Nicolae Street, 077190 Voluntari, Romania., Etemadi S; Abalonyx AS, Forskningsveien 1, 0373 Oslo, Norway., Wendelbo R; Abalonyx AS, Forskningsveien 1, 0373 Oslo, Norway., Yang J; Department of Materials and Nanotechnology, SINTEF AS, Forskningsveien 1, 0343 Oslo, Norway., Thorshaug K; Department of Materials and Nanotechnology, SINTEF AS, Forskningsveien 1, 0343 Oslo, Norway. |
| Abstrakt: |
The development of graphene-based materials for optical limiting functionality is an active field of research. Optical limiting for femtosecond laser pulses in the infrared-B (IR-B) (1.4-3 μm) spectral domain has been investigated to a lesser extent than that for nanosecond, picosecond and femtosecond laser pulses at wavelengths up to 1.1 μm. Novel nonlinear optical materials, glassy graphene oxide (GO)-based silico-phosphate composites, were prepared, for the first time to our knowledge, by a convenient and low cost sol-gel method, as described in the paper, using tetraethyl orthosilicate (TEOS), H 3 PO 4 and GO/reduced GO (rGO) as precursors. The characterisation of the GO/rGO silico-phosphate composite films was performed by spectroscopy (Fourier-transform infrared (FTIR), Ultraviolet-Visible-Near Infrared (UV-VIS-NIR) and Raman) and microscopy (atomic force microscopy (AFM) and scanning electron microscope (SEM)) techniques. H 3 PO 4 was found to reduce the rGO dispersed in the precursor's solution with the formation of vertically agglomerated rGO sheets, uniformly distributed on the substrate surface. The capability of these novel graphene oxide-based materials for the optical limiting of femtosecond laser pulses at 1550 nm wavelength was demonstrated by intensity-scan experiments. The GO or rGO presence in the film, their concentrations, the composite films glassy matrix, and the film substrate influence the optical limiting performance of these novel materials and are discussed accordingly. |
