Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-09-01

Journal: OPTICAL MATERIALS EXPRESS

Included Journals: EI、SCIE

Volume: 4

Issue: 9

Page Number: 1775-1786

ISSN: 2159-3930

Abstract: We propose fast tuning of a Fano resonance (FR) in a three dimensional metamaterial (MM). The MM consists of an elliptical nanohole array (ENA) embedded through a metal/phase-change material (PCM)/metal multilayer. The results show that the interference between the electric and magnetic resonances can be significantly enhanced when the elliptical nanoholes occupy the sites of a rectangular lattice, thus providing a FR with a higher value quality factor (Q) compared to the ENA with a square lattice. By switching the PCM (Ge2Sb2Te5) between its amorphous and crystalline states, the FR peak can be red-shifted by up to 42%. The FR can be tuned with a ultra low energy mid-infrared laser pulse of 0.38 ns duration and an intensity of 3.2 W/mu m(2). (C) 2014 Optical Society of America