Topological insulator metamaterials with tunable negative refractive index in the optical region

A blueshift tunable metamaterial (MM) exhibiting a double-negative refractive index based on a topological insulator (bismuth selenide, Bi(2)Se(3)) has been demonstrated in the near-infrared (NIR) spectral region. The potential of Bi(2)Se(3) as a dielectric interlayer of the multilayer MM is explore...

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Detalles Bibliográficos
Autores principales: Cao, Tun, Wang, Shuai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3866564/
https://www.ncbi.nlm.nih.gov/pubmed/24330596
http://dx.doi.org/10.1186/1556-276X-8-526
Descripción
Sumario:A blueshift tunable metamaterial (MM) exhibiting a double-negative refractive index based on a topological insulator (bismuth selenide, Bi(2)Se(3)) has been demonstrated in the near-infrared (NIR) spectral region. The potential of Bi(2)Se(3) as a dielectric interlayer of the multilayer MM is explored. The optical response of elliptical nanohole arrays penetrating through Au/Bi(2)Se(3)/Au films is numerically investigated using the finite difference time domain (FDTD) method. The blueshift tuning range of the MM is as high as 370 nm (from 2,140 to 1,770 nm) after switching the Bi(2)Se(3) between its trigonal and orthorhombic states.

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