In3SbTe2 as a programmable nanophotonics material platform for the infrared

Abstract

Conventionally, phase-change materials (PCMs) employed in active metasurfaces feature high optical contrast between their dielectric amorphous and crystalline phases. Here, we employ the non-volatile PCM In3SbTe2 (IST) which changes from dielectric to metallic upon crystallization in the whole infrared spectral range. We demonstrate the direct optical writing, erasing, and modifying of metallic IR nanoantennas in an IST thin-film, as well as switching from electric to magnetic dipole modes. We realize a tunable absorber and show nanoscale screening and “soldering” of pre-patterned meta-atoms. Our concepts enable rapid prototyping of infrared plasmonic meta-optics and may empower improved designs of programmable nanophotonic devices.

Authors 2

1. Andreas Heßler Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen Univ. (Germany)

2. Thomas Taubner Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen Univ. (Germany)