Work

Fast tuning of Fano resonance in metal/phase-change materials/metal metamaterials

Year: 2014

Type: article

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 3.2μW/μm2.

Source: Optical Materials Express

DOI: 10.1364/ome.4.001775

Authors: Tun Cao, Chenwei Wei, Robert E. Simpson, Lei Zhang, Martin J. Cryan

Institutions: Dalian University of Technology, Singapore University of Technology and Design, University of Bristol

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,843

Funders: National Science Foundation, National Natural Science Foundation of China