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Indexed by:期刊论文

Date of Publication:2013-12-13

Journal:NANOSCALE RESEARCH LETTERS

Included Journals:SCIE、EI、PubMed、Scopus

Volume:8

Issue:1

Page Number:526

ISSN No.:1556-276X

Key Words:Metamaterials; Metal-insulator-metal structures; Surface plasmons

Abstract:A blueshift tunable metamaterial (MM) exhibiting a double-negative refractive index based on a topological insulator (bismuth selenide, Bi2Se3) has been demonstrated in the near-infrared (NIR) 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 blueshift tuning range of the MM is as high as 370 nm (from 2,140 to 1,770 nm) after switching the Bi2Se3 between its trigonal and orthorhombic states.