Enhanced self-phase modulation in silicon nitride waveguides integrated with 2D graphene oxide films

Integrated Nonlinear Optics in Silicon Nitride Waveguides

Integrated optics platforms offer the possibility to implement compact photonic devices for nonlinear optics applications. Modern nanofabrication facilities allow the fabrication of sub-micron-sized waveguide geometries that confine light to reach very high optical intensities. These intensities enable efficient nonlinear processes that are further enhanced by using materials with high nonlinea...

Graphitic Carbon Nitride/Reduced Graphene Oxide/Silver Oxide Nanostructures with Enhanced Photocatalytic Activity in Visible Light

Visible light active graphitic carbon nitride/reduced graphene oxide/silver oxide nanocomposites with a p-n heterojunction structure were synthesized by chemical deposition methods. Prepared samples were characterized by different physico-chemical technics such as XRD, FTIR, SEM, TEM and DRS. Photocatalytic activity investigated by analyzing the Acid blue 92 (AB92) concentration during the time...

Guided photoluminescence study ofNd-doped Silicon Rich Silicon Oxide and Silicon Rich Silicon Nitride waveguides

Planar waveguides made of Nd 3+ -doped silicon rich silicon oxide (SRSO) and silicon rich silicon nitride (SRSN) have been fabricated by reactive magnetron sputtering and characterized with special emphasis on the comparison of the guided photoluminescence (PL) properties of these two matrices. Guided fluorescence excited by top surface pumping at 488 nm on planar waveguides was measured as a f...

Optical absorption in graphene integrated on silicon waveguides

To fully utilize graphene’s remarkable optical properties for optoelectronic applications, it needs to be integrated in planar photonic systems. Here, we demonstrate integration of graphene on silicon photonic circuits and precise measurement of the optical absorption coefficient in a graphene/ waveguide hybrid structure. A method based on Mach-Zehnder interferometry is employed to achieve high...

Enhanced photoresponsivity in graphene-silicon slow-light photonic crystal waveguides