Regensburg 2022 – scientific programme
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O: Fachverband Oberflächenphysik
O 35: Poster Tuesday: Plasmonics and Nanooptics 1
O 35.3: Poster
Tuesday, September 6, 2022, 11:00–13:00, P3
Large area writing of reconfigurable metasurfaces with the plasmonic PCM In3SbTe2 — •Natalie Honné1, Lukas Conrads1, Andreas Ulm2, Andreas Heßler1, Matthias Wuttig1, Robert Schmitt2, and Thomas Taubner1 — 1I. Institute of Physics (IA), RWTH Aachen University — 2Fraunhoferinstitut für Produktionstechnologie
Phase-change materials (PCMs) are optimal candidates for optical components being non-volatile and reversibly switchable. Their amorphous and crystalline phases differ tremendously in their properties. Conventional PCMs exhibit a large contrast in their refractive index and can be used to tune antenna resonances by influencing their surrounding.[1] Recently, plasmonic PCMs, like In3SbTe2, has been introduced. They switch between a dielectric (amorphous) and a metallic (crystalline) phase in the complete IR and enable optical writing of metallic nanoantennas directly in a dielectric surrounding.[2] Large area writing of reconfigurable metasurfaces is a key feature for tuneable nanophotonic devices. Here, the Nanoscribe Photonic Pofessional GT is used, a femtosecond laser writer with an infrared wavelength. Large area direct laser crystallization is investigated to fabricate antenna arrays of several hundred micrometers. Finally, a beam steering device is designed and fabricated. This work paves the way towards large area fabrication of functional metasurfaces in the IR with the ability of rapid prototyping for IR nanophotonic devices.
1. Wuttig et al., Nature Photonics 11,465 (2017)
2. Heßler et al., Nature Communications 12, 924 (2021)