Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Plasmonics and Nanooptics

O 36.2: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster A

Phase-change induced switching of a SiC superlens — •Johannes Reindl, Peinning Li, Lena Jung, and Thomas Taubner — Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany

Conventional optics can only resolve structures larger than half of the used lightsource's wavelengths. The utilization of the superlensing phenomenon enables an improved extraction of near-field information and thus beats the diffraction limit[1-2]. Nearly a decade ago the functionality of SiC as a superlens in infrared optics was shown [3]. But it suffers, like all phonon-polariton based superlenses, from its predetermined, non-changeable structural properties. The use of Phase-Change Materials, materials that can be switched reversibly between a stable crystalline and amorphous state, would expand the existing application by circumventing the monochromatic nature of this kind of superlens. Therefore, theoretical calculations of a switchable superlens and initial experimental measurements with s-SNOM are done on a layer-system consisting of SiC and germanium antimony teluride (GST).

[1] Pendry, Phys. Rev. Letters 85, 3966 (2000)

[2] Fang et al., Science 308, 534 (2005)

[2] Taubner et al., Science 313, 1595 (2006)