Journal
OPTICS EXPRESS
Volume 27, Issue 24, Pages 35238-35244Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.035238
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Funding
- National Natural Science Foundation of China [11874270]
- Fund Project for Shenzhen Fundamental Research Program [JCYJ20170818143652693, JCYJ20180305125000525]
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In this study, the dispersion equations of a graphene-coated nanowire (GN) are solved. It is found that in this waveguide, besides the surface plasmon polaritons (SPPs), there is another branch of guided modes, called photonic-like modes. The propagation distances of the photonic-like modes can be five orders of magnitude longer than those of the SPPs. Moreover, they can be modulated in the range of 10(-4) to 1 m by changing the chemical potential of graphene. In particular, the mode field distributions remain nearly unchanged during the modulation. Based on the analysis performed using COMSOL Multiphysics, we further demonstrated that the propagation losses of the photonic-like modes are dependent on not only the chemical potential of graphene, but also the mode power proportion inside graphene. The photonic-like modes have tremendous potential to be used in optical switches, modulators, and switches in magnetic fields at the nanoscale. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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