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We use time-dependent perturbation theory to study quantum size effects on the terahertz nonlinear response of metallic graphene armchair nanoribbons of finite length under an applied electric field. Our work shows that quantization due to the finite length of the nanoribbon, the applied field profile, and the broadening of the graphene spectrum all play a significant role in the resulting nonlinear...
Highly doped graphene has been demonstrated to be a promising plasmonic material where the excitation of surface plasmons can significantly enhance the interaction with light [1, 2]. Here we investigate the coupling effects in graphene nanodisk oligomers (heptamer) [2] and try to employ one of the interesting phenomena from the coupling, the so called Fano-resonances, for sensing applications [3]...
Graphene appears to be a good candidate in designing tunable devices operating in THz spectral ranges owing to its tunability of conductivity. It can be tuned dynamically via electrostatic doping [1, 2]. Here we propose a tunable terahertz half wave plate based on the hybridization effect caused by coupling interactions between plasmonic resonances in the two coupled graphene nanodisks (CGN). We show...
Electromagnetic interference (EMI) control is one of the most significant challenges for emerging consumer, automotive, Internet of things (IoT) and wearable systems. This paper demonstrates miniaturized and integrated nanostructures for component-level EMI isolation and external EMI shielding in ultra-miniaturized electronic systems. Multi-layered nanomagnetic and copper shielding materials are designed,...
We discuss atomistic approaches to quantum transport within the semi-empirical tight-binding framework. We show that the latter is well suited to the study of present nanostructures such as carbon nanotubes, semiconductor nanowires and graphene. It indeed provides a very good balance between accuracy and efficiency, and can be coupled with ab initio methods to upscale the calculations to the mesoscopic...
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