Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-06-01

Journal: MATERIALS EXPRESS

Included Journals: SCIE

Volume: 4

Issue: 3

Page Number: 196-204

ISSN: 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.