4 November 2014 Excitation of topological insulator plasmons by two-dimensional periodic structure
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Abstract
Plasmons induced by topological insulator (TI) Bi2Se3 micro-ribbon arrays have been experimentally observed recently (Nature nanotechnology 2013, 8, 556-560). In this letter, the surface plasmons excited by TI Bi2Se3 micro-disk arrays are investigated by the methods of full-wave numerical simulations. Numerical simulation results show that thin Bi2Se3 micro-disk arrays can support dipolar plasmon resonances in the terahertz (THz) regimes and the absorptions can be tuned by the structure parameters. In addition to the plasmon mode, two phonon-mode responses are also observed, which confirms the experimental results of micro-ribbon arrays. Our work further proves that TI can be a good candidate of plasmonic platform.
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Xiao Feng Gu, Xiao Feng Gu, Wei Bing Lu, Wei Bing Lu, Xiao Bing Li, Xiao Bing Li, Jian Wang, Jian Wang, Jun Hu, Jun Hu, } "Excitation of topological insulator plasmons by two-dimensional periodic structure", Proc. SPIE 9273, Optoelectronic Imaging and Multimedia Technology III, 92733K (4 November 2014); doi: 10.1117/12.2071886; https://doi.org/10.1117/12.2071886
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