Abstract
This article presents four different plasmonic structures using Graphene which yielded an efficient plasmonic mode with low loss for Supercontinuum(SC) generation. At an operating wavelength of 1550 nm in these structures, we generated a multi-octave broadband SC spectrum ranging from 1.5 um–25 um at a low input peak power of 1 W. Due to pumping in the anomalous dispersion region with two Zero Dispersion Wavelengths (ZDWs) and the process of cross phase modulation with soliton fission, red-shifted dispersive waves were generated which led to large broadening from 1.5 um–25 um. Two other Supercontinua ranging from 1–10 um and 0.85–2.2 um also at low input peak powers of 2 W and 0.1 W respectively were generated. These three supercontinua are useful for applications in the fields of biomedical sensors, spectroscopy, fluorescence lifetime imaging and in the design of many other new optical devices. Furthermore, we have also discussed our results on behaviour of Graphene as a metal, even without the negative real value of dielectric constant.
Highlights
This article presents four different plasmonic structures using Graphene which yielded an efficient plasmonic mode with low loss for Supercontinuum(SC) generation
Dispersion engineered waveguides and/or fibres using different materials have been developed but their main limitation is the control of peak input power with low loss for broadband Supercontinuum Generation (SCG)
In our design of Graphene waveguides for SCG: the structure of a ridge waveguide rests on a Silicon dioxide (SiO2) substrate with the inner and outer core surrounded by a low-index medium(air), thereby providing strong optical confinement
Summary
This article presents four different plasmonic structures using Graphene which yielded an efficient plasmonic mode with low loss for Supercontinuum(SC) generation. Detailed analysis of non-linear dynamics in solids, organic and inorganic liquids, gases[1], various types of waveguides and optical fibres[2, 3] has led to the design of wide-band Supercontinuum light sources They require very high input peak powers ranging from 1 kW to 1000 kW or more[2,3,4,5,6,7,8,9]. Graphene nano-ribbon and other waveguides have emerged showing possible outstanding applications in the fields of on-chip interconnects, bright visible light emission, flexible electronics and more[16, 17] In all these designs, Graphene has been used as the outer core or the cladding material. In our design of Graphene waveguides for SCG: the structure of a ridge waveguide rests on a Silicon dioxide (SiO2) substrate with the inner and outer core surrounded by a low-index medium(air), thereby providing strong optical confinement
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