Excitation of topological insulator plasmons by two-dimensional periodic structure

Xiao Feng Gu; Wei Bing Lu; Xiao Bing Li; Jian Wang; Jun Hu

doi:10.1117/12.2071886

4 November 2014 Excitation of topological insulator plasmons by two-dimensional periodic structure

Xiao Feng Gu, Wei Bing Lu, Xiao Bing Li, Jian Wang, Jun Hu

Proceedings Volume 9273, Optoelectronic Imaging and Multimedia Technology III; 92733K (2014) https://doi.org/10.1117/12.2071886
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

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.

Citation Download Citation

Xiao Feng Gu, Wei Bing Lu, Xiao Bing Li, Jian Wang, and 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); https://doi.org/10.1117/12.2071886

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