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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:MATERIALS EXPRESS

Included Journals:SCIE

Volume:4

Issue:3

Page Number:196-204

ISSN No.:2158-5849

Key Words:Metamaterials; Left-Handed Materials; Surface Plasmons; Tunable; Topological Insulator

Abstract:A blue-shift tunable nnetamaterial (MM) exhibiting a double-negative refractive index based on topological insulator (Bismuth Selenide, Bi2Se3) has been demonstrated in the near-infrared (N-IR) spectral region. The potential of Bi2Se3 as a dielectric interlayer of the multilayer MM is explored. The optical response of elliptical nanohole arrays penetrating through Au/Bi2Se3/Au films is numerically investigated using the finite difference time domain (FDTD) method. The blue-shift tuning range of the MM is as high as 370 nm (from 2140 nm to 1770 nm) after switching the Bi2Se3 between its trigonal and orthorhombic states.