Dresden 2014 – scientific programme
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DS: Fachverband Dünne Schichten
DS 44: Poster III: Focus session: Resistive switching by redox and phase change phenomena
DS 44.13: Poster
Thursday, April 3, 2014, 16:00–19:00, P1
Setup for optical switching of single antenna resonances in the mid-infrared using phase-change materials — •Thomas Kalix, Ann-Katrin Ursula Michel, Martin Salinga, and Thomas Taubner — Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany
Metallic nanostructures become more important in the field of plasmonics and metamaterials, since they locally enhance electromagnetic fields. For example the resonance frequency of rod-like shaped nanoantennas depends on the geometry, the material they are fabricated of and the refractive index n of the surrounding media [1].
Phase-change materials (PCM) are characterized by a fast phase transition between the amorphous and crystalline state. The structural change is accompanied by a huge modulation of n, which allows us to tune the resonance frequency of nanoantennas which are embedded in a PCM thin film [2]. The switching between the amorphous and crystalline phase can be realized reversibly for example by an optical pulse [3]. We built a laser setup which allow us the local switching of single nanostructures which are fabricated on the PCM Ge3Sb2Te6 with single nanosecond pulses.
[1] F. Neubrech et al., J. Appl. Phys. 89, 253104 (2006).
[2] A. Michel et al., Nano Lett., 13(8), pp 3470-3475 (2013).
[3] J. Siegel et al., J. Appl. Phys. 103, 023516 (2008).