Journal
NANOMATERIALS
Volume 9, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/nano9111594
Keywords
graphene plasmons; subwavelength structures; mid-infrared waves; waveguide
Categories
Funding
- Scientific Research Starting Foundation of Zhengzhou Normal University
- Open Research Fund of Zhengzhou Normal University
- Aid program for Science and Technology Innovative Research Team of Zhengzhou Normal University
Ask authors/readers for more resources
Graphene was recently proposed as a promising alternative to support surface plasmons with superior performances in the mid-infrared range. Here, we theoretically show that high-performance and low-loss transmission of graphene plasmons can be achieved by adding a silica substrate to the graphene-covered nanowire pairs. The effect of the substrate layer on mode properties has been intensively investigated by using the finite element method. Furthermore, the results show that inserting a low index material layer between the nanowire and substrate could compensate for the loss accompanied by the substrate, thus the mode properties could be adjusted to fulfill better performance. A reasonable propagation length of 15 mu m and an ultra-small normalized mode area about similar to 10(-4) could be obtained at 30 THz. The introduction of the substrate layer is crucial for practical fabrication, which provides additional freedom to tune the mode properties. The graphene-covered nanowire pairs with an extra substrate may inspire potential applications in tunable integrated nanophotonic devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available