期刊
出版社
IEEE
关键词
-
资金
- Japan Science and Technology Agency
- JSPS KAKENHI from Japan Society for the Promotion of Science [JP17H02730, JP16H0079, JP16H00906, JP16J09937, JP25107002]
- Support for Tokyotech Advanced Researchers (STAR)
Because of unique plasmonic features, nanostructured graphene such as graphene nanoribbons (CNRs) and quantum dots (GQDs) is attracting much interests. In this work, we investigated real-space characterization of surface plasmon polariton (SPP) in GQDs on SiC substrate by utilizing a scattering-type scanning near-field optical microscope (s-SNOM) in the mid-infrared (MIR) band. Nanoscale near-field images revealed that the SPP in the GQDs was excited at the wavenumber of 929.02 cm(-1), where the SPP in two-dimensional (2D) graphene has not been reported. The present findings provide not only a deeper understanding of the SPP in graphene nanostructures, but also a first step for exploring new plasmonic functionalities impossible with conventional 2D graphene.
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