Work

Electrically programmable multi-purpose nonvolatile metasurface based on phase change materials

Year: 2018

Type: article

Abstract: We propose an electrically programmable nonvolatile metasurface working at near-IR frequency ( λ = 1550 nm) based on ITO/Ge 2 Sb 2 Te 5 -ITO/Au crossbar structure. The proposed metasurface can dynamically change its optical function by modulating the crystallization level of Ge 2 Sb 2 Te 5 , which is a phase change material, at each pixel position individually by controlled electrical pulses. We design and optimize the metasurface by using finite-difference time-domain simulations and numerically demonstrate various optical functions including beam steering devices, flat lenses, optical vortex generators, and metasurface holograms with a single device geometry.

Source: Physica Scripta

DOI: 10.1088/1402-4896/aaf27c

Authors: Ho-Seok Ee, Ritesh Agarwal

Institutions: Kongju National University, University of Pennsylvania

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Multidisciplinary University Research Initiative, Office of Naval Research

Awards: G2756207379, G4504108201, G616003695, G8876996369, G8929337198