SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 40: Poster Session III: Poster to Mini-Symposium: Infrared nano-optics I
O 40.2: Poster
Dienstag, 2. März 2021, 10:30–12:30, P
In3SbTe2 as a Programmable Nanophotonics Material Platform for the Infrared — •Andreas Heßler1, Sophia Wahl1, Till Leuteritz2, Matthias Wuttig1, Stefan Linden2, and Thomas Taubner1 — 1Institute of Physics (IA), RWTH Aachen University — 2Physikalisches Institut, University of Bonn
The high dielectric optical contrast between the amorphous and crystalline phases of non-volatile phase-change materials (PCMs) provides a promising route towards tuneable nanophotonic devices [1]. Here [2], we employ the next-generation PCM In3SbTe2 (IST) whose optical properties change from dielectric to metallic upon crystallization in the whole infrared spectral range. We demonstrate how resonant metallic nanostructures can be directly written, modified and erased on and below the meta-atom level in an IST thin film by a pulsed switching laser. With this technology, we demonstrate large resonance shifts of nanoantennas of more than 4 µm, a tuneable mid-infrared absorber with nearly 90% absorptance as well as screening and nanoscale "soldering" of metallic nanoantennas. Our novel concepts can empower new and improved designs of programmable nanophotonic devices for telecommunications, (bio)sensing and infrared optics, e.g. programmable infrared detectors, emitters and reconfigurable holograms.
[1] M. Wuttig, H. Bhaskaran and T. Taubner. Nature Photonics 11, 465-476 (2017)
[2] A. Heßler, S. Wahl, T. Leuteritz et al.. in submission at Nature Communications (2020)