Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 35, Issue 2, Pages 446-453Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.35.000446
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- Shahid Chamran, University of Ahvaz
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In this article, we propose a class of high-performance and low-loss waveguide by exploiting the hybridization of the plasmon-phonon modes through the coupling graphene with hexagonal boron nitride (hBN). It is found that inserting an ultra-thin hBN layer with hyperbolicity behavior between graphene and a thin low-index substrate leads to squeezing a light into hBN, enabling a low-loss light propagation as compared with a traditional graphene/substrate plasmonic waveguide. Furthermore, the results show that by choosing appropriate values for physical parameters of the proposed waveguide as well as the chemical potential of graphene, a low-loss and high-performance optical plasmon-phonon mode in the mid-infrared range can be achieved simultaneously. In particular, by increasing the chemical potential from 0.2 to 1 eV, 12-and 6-fold enhancement for propagation length (Lm) and figure of merit, respectively, is achieved with the optimized proposed waveguide. The results presented here are very helpful for designing low-loss nanophotonic devices. (c) 2018 Optical Society of America
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