SKM 2023 – scientific programme

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SYSD: Symposium SKM Dissertation Prize 2023

SYSD 1: SKM Dissertation Prize

SYSD 1.4: Invited Talk

Monday, March 27, 2023, 11:00–11:30, HSZ 04

Electro-active metasurfaces employing metal-to-insulator phase transitions — •Julian Karst — 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Germany

Functional and active plasmonic nanostructures and metasurfaces are at the heart of emerging and novel optical technologies as they allow to confine and actively manipulate light on very small length scales. Ultimately, they will contribute to the miniaturization of existing and novel optical devices necessary in a great variety of different fields. They include but are not limited to new display and projection technologies for augmented and virtual reality, dynamic 3D holography devices or miniaturized LiDAR (Light Detection and Ranging) approaches. I will introduce and give an in-depth analysis of our novel approaches for such functional and active plasmonic systems and metasurfaces, utilizing metal-to-insulator phase change materials. In particular, I will highlight nanoantennas and metasurfaces from metallic polymers which can be electrically switched in the infrared spectral range via CMOS-compatible voltages. This concept is based on an electrically driven metal-to-insulator phase transition and allows me to demonstrate, on the one hand, metasurfaces for ultra-high-contrast active beam switching. On the other hand, I realize an electro-active metaobjective comprising metalenses-on-demand. By using gel electrolytes, the presented metadevices can even be integrated into state-of-the-art on-chip electro-optic components.